PATENT AND TRADEMARK SECURITY AGREEMENT

          THIS PATENT AND TRADEMARK SECURITY AGREEMENT (this "Agreement"), 
dated as of March 29, 1999, is made between Amerigon Incorporated, a 
California corporation ("Borrower"), and Big Star Investments LLC, a Delaware 
limited liability company ("Lender").

          Borrower and Lender are parties to a Security Agreement dated as of 
March 29, 1999 (as amended, modified, renewed or extended from time to time, 
the "Security Agreement"), which Security Agreement provides, among other 
things, for the grant by Borrower to Lender of a security interest in, 
certain of Borrower's property and assets, including, without limitation, its 
patents and patent applications, its trademarks, service marks and trade 
names, and its applications for registration of such trademarks, service 
marks and trade names. Pursuant to the Security Agreement, Borrower has 
agreed to execute and deliver this Agreement to Lender for filing with the 
United States Patent and Trademark Office (the "PTO") (and any other relevant 
recording systems in any domestic or foreign jurisdiction), and as further 
evidence of and to effectuate such assignment of and grant of a security 
interest in such patents and patent applications, trademarks, service marks 
and trade names, and applications for registration of such trademarks, 
service marks and trade names, and the other general intangibles described 
herein.  Accordingly, Borrower and Lender hereby agree as follows:

          SECTION 1.   DEFINITIONS; INTERPRETATION.

          (a)   All capitalized terms used in this Agreement and not 
otherwise defined herein shall have the meanings assigned to them in the 
Security Agreement.

          (b)   In this Agreement, (i) the meaning of defined terms shall be 
equally applicable to both the singular and plural forms of the terms 
defined; and (ii) the captions and headings are for convenience of reference 
only and shall not affect the construction of this Agreement.

          SECTION 2.   ASSIGNMENT AND GRANT OF SECURITY INTEREST.

          (a)   As security for the payment and performance of the Secured 
Obligations (as defined in the Security Agreement), Borrower hereby assigns, 
transfers and conveys and grants a security interest in and mortgage to 
Lender, for security purposes, all of Borrower's right, title and interest 
in, to and under the following property, whether now existing or owned or 
hereafter acquired, developed or arising (collectively, the "Intellectual 
Property Collateral"):

          (i)   all patents and patent applications, domestic or foreign, all 
licenses relating to any of the foregoing and all income and royalties with 
respect to any licenses (including, without limitation, such patents and 
patent applications as described in SCHEDULE A hereto), all rights to sue for 
past, present or future infringement thereof, all rights arising therefrom 
and pertaining thereto and all reissues, reexaminations, divisions, 
continuations, renewals, extensions and continuations-in-part thereof;




          (ii)  all state (including common law), federal and foreign 
trademarks, service marks and trade names, and applications for registration 
of such trademarks, service marks and trade names, all licenses relating to 
any of the foregoing and all income and royalties with respect to any 
licenses (including, without limitation, such marks, names and applications 
as described in SCHEDULE B hereto), whether registered or unregistered and 
wherever registered, all rights to sue for past, present or future 
infringement or unconsented use thereof, all rights arising therefrom and 
pertaining thereto and all reissues, extensions and renewals thereof;

          (iii) the entire goodwill of or associated with the businesses now 
or hereafter conducted by Borrower connected with and symbolized by any of 
the aforementioned properties and assets;

          (iv)  all general intangibles (as defined in the UCC) and all 
intangible intellectual or other similar property of the Borrower of any kind 
or nature, associated with or arising out of any of the aforementioned 
properties and assets and not otherwise described above; and

          (v)   all products and proceeds of any and all of the foregoing.

          (b)   This Agreement shall create a continuing security interest in 
the Intellectual Property Collateral which shall remain in effect until 
terminated in accordance with Section 17 hereof. 

          SECTION 3.   FURTHER ASSURANCES; APPOINTMENT OF LENDER AS 
ATTORNEY-IN-FACT.  Borrower at its expense shall execute and deliver, or 
cause to be executed and delivered, to Lender any and all documents and 
instruments, in form and substance satisfactory to Lender, and take any and 
all action, which Lender may reasonably request from time to time, to perfect 
and continue perfected, maintain the priority of or provide notice of 
Lender's security interest in the Intellectual Property Collateral and to 
accomplish the purposes of this Agreement.  Lender shall have the right to, 
in the name of the Borrower, or in the name of Lender or otherwise, without 
notice to or assent by the Borrower, and the Borrower hereby irrevocably 
constitutes and appoints Lender (and any of Lender's officers or employees or 
agents designated by Lender) as the Borrower's true and lawful 
attorney-in-fact with full power and authority, (i) to sign the name of the 
Borrower on all or any of such documents or instruments and perform all other 
acts that Lender deems necessary or advisable in order to perfect or continue 
perfected, maintain the priority or enforceability of or provide notice of 
Lender's security interest in, the Intellectual Property Collateral, and (ii) 
to execute any and all other documents and instruments, and to perform any 
and all acts and things for and on behalf of the Borrower, which Lender may 
deem necessary or advisable to maintain, preserve and protect the 
Intellectual Property Collateral and to accomplish the purposes of this 
Agreement, including (A) to defend, settle, adjust or (after the occurrence 
of any Event of Default) institute any action, suit or proceeding with 
respect to


                                     2.



the Intellectual Property Collateral, and, after the occurrence of any Event 
of Default, (B) to assert or retain any rights under any license agreement 
for any of the Intellectual Property Collateral, including without limitation 
any rights of the Borrower arising under Section 365(n) of the Bankruptcy 
Code, and (C) after the occurrence of any Event of Default, to execute any 
and all applications, documents, papers and instruments for Lender to use the 
Intellectual Property Collateral, to grant or issue any exclusive or 
non-exclusive license or sub-license with respect to any Intellectual 
Property Collateral, and to assign, convey or otherwise transfer title in or 
dispose of the Intellectual Property Collateral; PROVIDED, HOWEVER, that in 
no event shall Lender have the unilateral power, prior to the occurrence and 
continuation of an Event of Default, to assign any of the Intellectual 
Property Collateral to any Person, including themselves, without the 
Borrower's written consent.  The foregoing shall in no way limit Lender's 
rights and remedies upon or after the occurrence of an Event of Default.  The 
power of attorney set forth in this Section 3, being coupled with an 
interest, is irrevocable, so long as this Agreement shall not have terminated 
in accordance with Section 17. 

          SECTION 4.   FUTURE RIGHTS.  Except as otherwise expressly agreed 
to in writing by Lender, if and when the Borrower shall obtain rights to any 
new patentable inventions or any new trademarks, or become entitled to the 
benefit of any of the foregoing, or obtain rights or benefits with respect to 
any reissue, division, continuation, renewal, extension or 
continuation-in-part of any patents or trademarks or, or any improvement of 
any patent, the provisions of Section 2 shall automatically apply thereto and 
the Borrower shall give to Lender prompt notice thereof.  Borrower shall do 
all things deemed necessary or advisable by Lender to ensure the validity, 
perfection, priority and enforceability of the security interests of Lender 
in such future acquired Intellectual Property Collateral.  Borrower hereby 
authorizes Lender to modify, amend, or supplement the Schedules hereto and to 
reexecute this Agreement from time to time on Borrower's behalf and as its 
attorney-in-fact to include any such future Intellectual Property Collateral 
and to cause such reexecuted Agreement or such modified, amended or 
supplemented Schedules to be filed with PTO.

          SECTION 5.   LENDER'S DUTIES.  Notwithstanding any provision 
contained in this Agreement, Lender shall have no duty to exercise any of the 
rights, privileges or powers afforded to it and shall not be responsible to 
the Borrower or any other Person for any failure to do so or delay in doing 
so. Except for the accounting for moneys actually received by Lender 
hereunder or in connection herewith, Lender shall have no duty or liability 
to exercise or preserve any rights, privileges or powers pertaining to the 
Intellectual Property Collateral.

          SECTION 6.   REPRESENTATIONS AND WARRANTIES.  Borrower represents 
and warrants to Lender that:

          (a)   A true and correct list of all of the existing Intellectual 
Property Collateral consisting of United States patents and patent 
applications and/or registrations owned by the Borrower, in whole or in part, 
is set forth in SCHEDULE A.

          (b)   A true and correct list of all of the existing Intellectual 
Property Collateral consisting of United States trademarks, trademark 
registrations and/or applications owned by the Borrower, in whole or in part, 
is set forth in SCHEDULE B.

          (c)   All patents, trademarks, service marks and trade names of 
Borrower are subsisting and have not been adjudged invalid or unenforceable 
in whole or in part.

          (d)   All maintenance fees at the large entity rate required to be
paid on account of any patents or trademarks of Borrower have been timely paid
for maintaining such patents and


                                     3.



trademarks in force, and, to the best of Borrower's knowledge, each of the 
patents and trademarks constituting part of the Intellectual Property 
Collateral is valid and enforceable.

          (e)   To the best of Borrower's knowledge after due inquiry, no 
material infringement or unauthorized use presently is being made of any 
Intellectual Property Collateral by any Person.

          (f)   Borrower is the sole and exclusive owner of the Intellectual 
Property Collateral and the past, present and contemplated future use of such 
Intellectual Property Collateral by Borrower has not, does not and will not 
infringe or violate any right, privilege or license agreement of or with any 
other Person.

          SECTION 7.   COVENANTS.

          (a)   Borrower will appear in and defend any action, suit or 
proceeding which may affect to a material extent its title to, or Lender's 
rights or interest in, the Intellectual Property Collateral.

          (b)   Borrower will not allow or suffer any Intellectual Property 
Collateral to become abandoned, nor any registration thereof to be 
terminated, forfeited, expired or dedicated to the public.

          (c)   Borrower will diligently prosecute all applications for 
patents and trademarks, and file and prosecute any and all continuations, 
continuations-in-part, applications for reissue, applications for certificate 
of correction and like matters as shall be reasonable and appropriate in 
accordance with prudent business practice, and promptly pay any and all 
maintenance, license, registration and other fees, taxes and expenses 
incurred in connection with any Intellectual Property Collateral.

          SECTION 8.   LENDER'S RIGHTS AND REMEDIES.

          (a)   Lender shall have all rights and remedies available to it 
under the Security Agreement, the other Loan Documents and applicable law 
with respect to the security interests in any of the Intellectual Property 
Collateral or any other collateral.  Borrower agrees that such rights and 
remedies include, but are not limited to, the right of Lender as a secured 
party to sell or otherwise dispose of its collateral after default pursuant 
to the UCC.  Borrower agrees that Lender shall at all times have such royalty 
free licenses, to the extent permitted by law and Borrower's existing 
contracts, for any Intellectual Property Collateral that shall be reasonably 
necessary to permit the exercise of any of Lender's rights or remedies upon 
or after the occurrence of an Event of Default and shall additionally, 
effective upon or after the occurrence of an Event of Default, have the right 
to license and/or sublicense any Intellectual Property Collateral, whether 
general, special or otherwise, and whether on an exclusive or a nonexclusive 
basis, any of the Intellectual Property Collateral, throughout the world for 
such term or terms, on such conditions, and in such manner, as Lender in its 
discretion shall determine.  In addition to and without limiting any of the 
foregoing, upon the occurrence and during the continuance of an Event of 
Default, Lender shall have the right but shall in no way be obligated to 
bring suit, or to take such other action as Lender deems necessary or 
advisable, in the name of the Borrower or Lender, to enforce or protect any 
of the Intellectual Property Collateral, in which event the


                                     4.



Borrower shall, at the request of Lender, do any and all lawful acts and 
execute any and all documents required by Lender in aid of such enforcement.
To the extent that Lender shall elect not to bring suit to enforce such 
Intellectual Property Collateral, Borrower agrees to use all reasonable 
measures and its diligent efforts, whether by action, suit, proceeding or 
otherwise, to prevent the infringement, misappropriation or violations 
thereof by others and for that purpose agrees diligently to maintain any 
action, suit or proceeding against any Person necessary to prevent such 
infringement, misappropriation or violation.

          (b)   The cash proceeds actually received from the sale or other 
disposition or collection of Intellectual Property Collateral, and any other 
amounts received in respect of the Intellectual Property Collateral the 
application of which is not otherwise provided for herein, shall be applied 
as provided in the Security Agreement.

          SECTION 9.   NOTICES.  All notices or other communications 
hereunder shall be in writing (including by facsimile transmission) shall be 
mailed, sent or delivered in accordance with the Security Agreement at or to 
their respective addresses or facsimile numbers set forth below their names 
on the signature pages hereof, or at or to such other address or facsimile 
number as shall be designated by any party in a written notice to the other 
parties hereto.  All such notices and other communications shall be effective 
as provided in the Security Agreement.

          SECTION 10.  NO WAIVER; CUMULATIVE REMEDIES.  No failure on the 
part of Lender to exercise, and no delay in exercising, any right, remedy, 
power or privilege hereunder shall operate as a waiver thereof, nor shall any 
single or partial exercise of any such right, remedy, power or privilege 
preclude any other or further exercise thereof or the exercise of any other 
right, remedy, power or privilege.  The rights and remedies under this 
Agreement are cumulative and not exclusive of any rights, remedies, powers 
and privileges that may otherwise be available to Lender.

          SECTION 11.  COSTS AND EXPENSES; INDEMNITY.

          (a)   Borrower agrees to pay on demand all costs and expenses of 
Lender, including without limitation all reasonable attorneys' fees, in 
connection with the enforcement or attempted enforcement of, and preservation 
of any rights or interests under, this Agreement, and the assignment, sale or 
other disposal of any of the Intellectual Property Collateral.

          (b)   Borrower hereby agrees to indemnify Lender and any of its
affiliates, and their respective directors, officers, employees, agents, counsel
and other advisors (each an "Indemnified Person") against, and hold each of them
harmless from, any and all liabilities, obligations, losses, claims, damages,
penalties, actions, judgments, suits, costs, expenses or disbursements of any
kind or nature whatsoever, including, without limitation, reasonable attorneys'
fees and attorneys' fees incurred pursuant to Chapter 11 United States Code,
which may be imposed on, incurred by, or asserted against any Indemnified
Person, in any way relating to or arising out of this Agreement, including in
connection with any infringement or alleged infringement with respect to any
Intellectual Property Collateral, or any action taken or omitted to be taken by
it hereunder (the "Indemnified Liabilities"); PROVIDED that Borrower shall not
be liable to any Indemnified Person for any portion of such Indemnified
Liabilities to the extent they are found by a final decision of a court of
competent jurisdiction to have resulted from such


                                     5.



Indemnified Person's gross negligence or willful misconduct.  If and to the 
extent that the foregoing indemnification is for any reason held 
unenforceable, Borrower agrees to make the maximum contribution to the 
payment and satisfaction of each of the Indemnified Liabilities which is 
permissible under applicable law.

          (c)   Any amounts payable to Lender under this Section 11 or 
otherwise under this Agreement if not paid upon demand shall bear interest 
from the date of such demand until paid in full, at the rate of interest set 
forth in the Note.

          SECTION 12.  BINDING EFFECT.  This Agreement shall be binding upon, 
inure to the benefit of and be enforceable by Borrower, Lender and their 
respective successors and assigns.

          SECTION 13.  GOVERNING LAW.  This Agreement shall be governed by, 
and construed in accordance with, the law of the State of California, except 
to the extent that the validity or perfection of the assignment and security 
interests hereunder in respect of any Intellectual Property Collateral are 
governed by federal law and except to the extent that Lender shall have 
greater rights or remedies under federal law, in which case such choice of 
California law shall not be deemed to deprive Lender of such rights and 
remedies as may be available under federal law.

          SECTION 14.  AMENDMENT.  This Agreement contains the entire 
agreement of the parties with respect to the subject matter hereof and no 
amendment to this Agreement, or any waiver of any provision hereof, shall be 
effective unless it is in writing and signed by Lender and (in the case of 
any amendment) the Borrower. 

          SECTION 15.  SEVERABILITY.  Whenever possible, each provision of 
this Agreement shall be interpreted in such manner as to be effective and 
valid under all applicable laws and regulations.  If, however, any provision 
of this Agreement shall be prohibited by or invalid under any such law or 
regulation in any jurisdiction, it shall, as to such jurisdiction, be deemed 
modified to conform to the minimum requirements of such law or regulation, 
or, if for any reason it is not deemed so modified, it shall be ineffective 
and invalid only to the extent of such prohibition or invalidity without 
affecting the remaining provisions of this Agreement, or the validity or 
effectiveness of such provision in any other jurisdiction.

          SECTION 16.  COUNTERPARTS.  This Agreement may be executed in any 
number of counterparts and by different parties hereto in separate 
counterparts, each of which when so executed shall be deemed to be an 
original and all of which taken together shall constitute one and the same 
agreement.

          SECTION 17.  TERMINATION.  Upon payment and performance in full of
all Secured Obligations, this Agreement shall terminate and Lender shall
promptly execute and deliver to Borrower such documents and instruments
reasonably requested by Borrower as shall be necessary to evidence termination
of all security interests given by Borrower to Lender hereunder, including
cancellation of this Agreement by written notice from Lender to the PTO;
PROVIDED, HOWEVER, that (i)the obligations of Borrower under Section 11 hereof
shall survive such termination and (ii) in the event a voluntary proceeding in
bankruptcy is filed by Borrower or an involuntary proceeding in bankruptcy is
filed against Borrower, this Agreement and


                                     6.



Lender's interest in the Intellectual Property Collateral created hereby 
shall survive such proceeding.

          SECTION 18.  SECURITY AGREEMENT.  Borrower acknowledges that the 
rights and remedies of Lender with respect to the security interests in the 
Intellectual Property Collateral granted hereby are more fully set forth in 
the Security Agreement and the other Loan Documents and all such rights and 
remedies are cumulative.

          SECTION 19.  NO INCONSISTENT REQUIREMENTS.  Borrower acknowledges 
that this Agreement and the Security Agreement may contain covenants and 
other terms and provisions variously stated regarding the same or similar 
matters, and the Borrower agrees that all such covenants, terms and 
provisions are cumulative and all shall be performed and satisfied in 
accordance with their respective terms.

          SECTION 20.  CONFLICTS.  In the event of any conflict or 
inconsistency between this Agreement and the Security Agreement, the terms of 
this Agreement shall control.


                                     7.



          IN WITNESS WHEREOF, the parties hereto have duly executed this 
Patent and Trademark Security Agreement, as of the date first above written.


                                   BORROWER:

                                   AMERIGON INCORPORATED, a California
                                   corporation


                                   By /s/ LON E. BELL
                                     -----------------------------------------
                                        Name:
                                        Title:

                                   Address:

                                   -------------------------------------------

                                   -------------------------------------------
                                   Attn:
                                        --------------------------------------
                                   Fax:
                                       ---------------------------------------


                                   LENDER:

                                   BIG STAR INVESTMENTS LLC


                                   By /s/ JOHN W. CLARK
                                     -----------------------------------------
                                        Name:
                                        Title:

                                   Address:

                                   -------------------------------------------

                                   -------------------------------------------
                                   Attn:
                                        --------------------------------------
                                   Fax:
                                       ---------------------------------------




                                    8.



STATE OF CALIFORNIA     )
                        )  ss
COUNTY OF_______________)


          On ___________ , before me, _____________, Notary Public, personally
appeared ___________________________, personally known to me (or proved to me on
the basis of satisfactory evidence) to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacity(ies), and that by
his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.

          WITNESS my hand and official seal.




                                               _____________________________
                                               Signature



[SEAL]



                                      9.



STATE OF CALIFORNIA   )
                      )  ss
COUNTY OF_____________)


          On ___________ , before me, _____________, Notary Public, personally
appeared ___________________________, personally known to me (or proved to me on
the basis of satisfactory evidence) to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacity(ies), and that by
his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.

          WITNESS my hand and official seal.



                                                _____________________________
                                                Signature



[SEAL]



                                      10.