EXHIBIT 10.7

                            PATENT SECURITY AGREEMENT


     This  Patent  Security  Agreement  ("Agreement")  is made  this 20th day of
March,  2002, by BLONDER  TONGUE  INVESTMENT  COMPANY,  a Delaware  corporation,
having a mailing  address of One Jake Brown Road,  Old Bridge,  New Jersey 08857
("Surety") and delivered to COMMERCE BANK, N.A. having a mailing address of 1701
Route 70 East, Cherry Hill, New Jersey 08034 ("Lender").

                                   BACKGROUND

     A. This  Agreement is being  executed  contemporaneously  with that certain
Surety  Agreement of even date herewith  between Surety and Lender (as it may be
supplemented,  restated,  superseded, amended or replaced from time to time, the
"Surety Agreement"),  under which Surety is guarantying the repayment by Blonder
Tongue Laboratories,  Inc.  ("Borrower") to Lender of the Obligations under that
certain Loan and Security  Agreement  between Borrower and Lender dated the date
hereof ("Loan Agreement"). As security for the Obligations, Surety has agreed to
grant  Lender a security  interest in  Surety's  Patent  Collateral  (as defined
herein),  and under which Lender is entitled to foreclose or otherwise deal with
such assets under the terms and conditions set forth herein.  Capitalized  terms
not defined  herein  shall have the  meanings  given to such terms in the Surety
Agreement or Loan Agreement as applicable.

     B. Surety has rights with respect to: (i) the United States Letters Patents
and the inventions  described and claimed therein set forth on Schedule A hereto
(hereinafter  referred to collectively  as the "Patents");  (ii) the application
for Letters  Patents and the inventions  described and claimed therein set forth
on Schedule A hereto and any United States  Letters  Patents which may be issued
upon any of said  applications  (hereinafter  referred  to  collectively  as the
"Applications");  (iii) any reissues, extension, division or continuation of the
Patents or Applications (such reissues,  extension,  divisions and continuations
being herein referred to collectively as the "Reissued  Patents");  and (iv) all
future royalties or other fees paid or payments made to Surety in respect of the
Patents including,  without limitation, any royalties due or owing from Borrower
to  Surety  (hereinafter  referred  to  collectively  as the  "Royalties")  (the
Patents,  Applications  and the Reissued  Patents and the Royalties being herein
referred to collectively as the "Patent Rights").  Notwithstanding the foregoing
or any representation to the contrary in this Agreement,  as of the date hereof,
Surety's interest (ownership or otherwise) in the Patent Rights is not of record
with the United States Patent and Trademark Office.

     NOW   THEREFORE,   with  the  foregoing   Background   hereinafter   deemed
incorporated by reference and made a part hereof,  and in  consideration  of the
premises and mutual promises herein contained,  the parties hereto, intending to
be legally bound hereby, covenant and agree as follows:

     1. In consideration of the Surety Agreement,  and for other good,  valuable
and sufficient consideration,  the receipt of which is hereby acknowledged,  and
to secure  repayment of the  Obligations,  Surety grants to Lender a lien on and
security  interest in all of the Patent Rights and all proceeds  thereof and all
Surety's right, title, interest,  claims and demands that Surety has or may have
in profits and damages for past and future  infringements  of the Patent  Rights
(such rights, interest, claims and demand being herein called the "Claims") (the
Patent  Rights  and  Claims  are   collectively   referred  to  as  the  "Patent
Collateral").




     2. Surety hereby covenants and agrees to maintain the Patent  Collateral as
permitted  under  applicable  law in full force and effect until all of Surety's
Obligations are indefeasibly paid and satisfied in full.

     3. Surety represents, warrants and covenants to Lender that:

          (a) Except as set forth in the Section 3(d) below,  Surety is the sole
and exclusive owner of the entire and unencumbered  right, title and interest in
and to the Patent Collateral as set forth on Schedule "A".

          (b) The Patent  Collateral  is  subsisting  and has not been  adjudged
invalid or unenforceable;

          (c) All of the Patent Rights are registered, valid and enforceable;

          (d) All of the  Patent  Collateral  is free and  clear  of any  liens,
charges and encumbrances including,  without limitation,  pledges,  assignments,
licenses (other than to Surety,  Borrower and Lender hereunder) and covenants by
Surety not to sue third persons;

          (e)  Surety  has no  notice  of any  suits  or  actions  commenced  or
threatened  against it, or notice of claims  asserted or threatened  against it,
with reference to the Patent Collateral;

          (f) Surety has the  corporate  power and  authority to enter into this
Agreement and perform its terms;

          (g) Surety has complied  with,  and will  continue for the duration of
this Agreement to comply with the requirements set forth in 35 U.S.C.  Sec. 1 et
seq. and any other applicable statutes, rules and regulations in connection with
its use of the Patent Collateral except where failure to comply would not have a
material adverse effect on Surety or its property; and

          (h) Surety has used and will  continue to use for the duration of this
Agreement,  consistent  standards  of quality in services or products  leased or
sold under the Patent  Collateral  and hereby grants to Lender and its employees
and agents the right  (with no  obligation  of any kind upon Lender to do so) to
visit Surety's affiliates, franchises or management locations and to inspect the
use of the Patent  Collateral and quality  control records  relating  thereto at
reasonable  times during regular  business hours to ensure  Surety's  compliance
with this paragraph 3(h).

     4. Surety further covenants that:

          (a) Until all the Obligations are  indefeasibly  paid and satisfied in
full and the  Revolving  Credit is  terminated,  Surety  will not enter into any
agreement,  including, without limitation,  license agreements or options, which
are  inconsistent  with Surety's  obligations  under this Agreement,  Borrower's
obligations  under the Loan  Agreement,  or which  restrict  or impair  Lender's
rights hereunder.

                                       2


          (b) If  Surety  acquires  rights  to any  new  United  States  Letters
Patents,  the provisions of this Agreement shall automatically apply thereto and
such Letters Patents shall be deemed part of the Patent Collateral. Surety shall
give Lender written notice thereof along with an amended Schedule "A."

     5. So long as this  Agreement  is in effect  and so long as Surety  has not
received notice from Lender that an Event of Default has occurred under the Loan
Agreement and that Lender has not elected to exercise its rights hereunder:  (i)
Surety shall continue to have the exclusive right to use the Patent  Collateral;
and (ii) Lender  shall have no right to use the Patent  Collateral  or issue any
exclusive or non-exclusive  license with respect thereto,  or assign,  pledge or
otherwise transfer title in the Patent Collateral to anyone else.

     6. Surety agrees not to sell, license,  grant any option, assign or further
encumber  its rights and  interest  in the  Patent  Collateral  to any entity or
person other than Lender,  Borrower or any other subsidiary of Borrower that has
guaranteed the Obligations without the prior written consent of Lender.

     7. Anything herein contained to the contrary notwithstanding,  if and while
an Event of Default exists under the Loan Agreement, Surety hereby covenants and
agrees  that  Lender,  as the holder of a security  interest  under the  Uniform
Commercial  Code, as now or hereafter in effect in the State of New Jersey,  may
take such action permitted hereunder, in its exclusive discretion,  to foreclose
upon the Patent Collateral covered hereby. For such purposes,  while an Event of
Default exists, Surety hereby authorizes and empowers Lender to make, constitute
and  appoint  any  officer  or agent of  Lender  as Lender  may  select,  in its
exclusive  discretion,  as Surety's true and lawful  attorney-in-fact,  with the
power to  endorse  Surety's  name on all  applications,  documents,  papers  and
instruments  necessary  for Lender to use the Patent  Collateral  or to grant or
issue any  exclusive or  non-exclusive  license  under the Patent  Collateral to
anyone else,  or  necessary  for Lender to assign,  pledge,  convey or otherwise
transfer title in or dispose of the Patent  Collateral to anyone else including,
without  limitation,  the  power  to  execute  a Patent  Assignment  in the form
attached  hereto as Exhibit 1. Surety hereby  ratifies all that such attorney or
agent  shall  lawfully do or cause to be done by virtue  hereof,  except for the
gross negligence or willful  misconduct of such attorney or agent. This power of
attorney  shall  be  irrevocable  for the  life of this  Agreement,  the  Surety
Agreement,  and until all of the Obligations are indefeasibly paid and satisfied
in full and the Revolving Credit is terminated.

     8. This Agreement shall be subject to the terms, provisions, and conditions
set forth in the Surety  Agreement  and may not be modified  without the written
consent of the party against whom enforcement is being sought.

     9. All rights and remedies herein granted to Lender shall be in addition to
any rights and remedies granted to Lender under the Loan Documents. In the event
of an inconsistency  between this Agreement and Loan Documents,  the language of
this Agreement shall control.

     10. Upon Surety's  performance of all of the  obligations  under the Surety
Agreement and after all of the Obligations are  indefeasibly  paid and satisfied
in full and the  Revolving  Credit is  terminated,  Lender  shall,  at  Surety's
expense,  execute and deliver to Surety all  documents  reasonably  necessary to
terminate Lender's security interest in the Patent Collateral.

                                       3


     11. Any and all reasonable  fees,  costs and expenses,  of whatever kind or
nature,  including the reasonable attorneys' fees and legal expenses incurred by
Lender  in  connection  with the  preparation  of this  Agreement  and all other
documents  relating hereto and the consummation of this transaction,  the filing
or recording of any documents  (including all taxes in connection  therewith) in
public offices, the payment or discharge of any taxes,  reasonable counsel fees,
maintenance  fees,  encumbrances  or costs  otherwise  incurred  in  protecting,
maintaining,  preserving the Patent  Collateral,  or in defending or prosecuting
any actions or proceedings  arising out of or related to the Patent  Collateral,
in each case in accordance with the terms of this Agreement,  shall be borne and
paid by  Surety on  demand  by  Lender  and until so paid  shall be added to the
principal  amount of the  Obligations  to Lender and shall bear  interest at the
otherwise applicable rate prescribed in the Loan Agreement.

     12. Subject to the terms of this  Agreement,  Surety shall have the duty to
prosecute  diligently any application  and/or  registration  with respect to the
Patent Collateral pending as of the date of this Agreement or thereafter,  until
the  Obligations are  indefeasibly  paid and satisfied in full and the Revolving
Credit  is  terminated  to  preserve  and  maintain  all  rights  in the  Patent
Collateral,  and upon  reasonable  request of Lender,  Surety shall make federal
application on registerable  but  unregistered  Patent  Collateral  belonging to
Surety and licensed to Surety unless  Surety  determines in good faith that such
unregistered  Patent Collateral does not have any material value. Any reasonable
expenses  incurred  in  connection  with  such   applications   shall  be  borne
exclusively by Surety.  Surety shall not abandon any Patent  Collateral  without
the prior written consent of Lender.

     13.  Surety  shall  have the right to bring suit in its own name to enforce
the Patent Collateral,  in which event Lender may, if Surety reasonably deems it
necessary,  be joined as a nominal  party to such suit if Lender shall have been
satisfied, in its sole discretion,  that it is not thereby incurring any risk of
liability because of such joinder. Surety shall promptly, upon demand, reimburse
and indemnify Lender for all damages,  costs and expenses,  including reasonable
attorneys'  fees  and  costs,  incurred  by  Lender  in the  fulfillment  of the
provisions of this paragraph.

     14. Upon the  occurrence of an Event of Default under the Loan Agreement or
Surety  Agreement,  Lender may,  without any  obligation to do so,  complete any
obligation of Surety hereunder, in Surety's name or in Lender's name, but at the
expense of Surety.

     15. No course of dealing  between  Surety and  Lender,  nor any  failure to
exercise,  nor any delay in exercising,  on the part of Lender, any right, power
or privilege  hereunder,  shall operate as a waiver thereof, and all of Lender's
rights and remedies with respect to the Patent Collateral,  whether  established
hereby or by the Surety  Agreement,  or by any other future  agreements  between
Surety and Lender or by law, shall be cumulative and may be exercised singularly
or concurrently.

     16. The  provisions of this  Agreement are severable and the  invalidity or
unenforceability  of  any  provision  herein  shall  not  affect  the  remaining
provisions which shall continue unimpaired and in full force and effect.

     17. This  Agreement  shall inure to the benefit of and be binding  upon the
respective successors and permitted assigns of the parties.

                                       4


     18. Surety  irrevocably  agrees to consent to the jurisdiction of the state
and  federal  courts of the  jurisdiction  set forth in Section  9.1 of the Loan
Agreement, without regard to its otherwise applicable principles or conflicts of
law.

     19. SURETY AND LENDER BY ITS  ACCEPTANCE  HEREOF) HEREBY WAIVES ANY AND ALL
RIGHTS IT MAY HAVE TO A JURY TRIAL IN CONNECTION WITH ANY LITIGATION, PROCEEDING
OR  COUNTERCLAIM  ARISING WITH RESPECT TO RIGHTS AND  OBLIGATIONS OF THE PARTIES
HERETO OR UNDER THE SURETY  AGREEMENT OR WITH RESPECT TO ANY CLAIMS  ARISING OUT
OF ANY DISCUSSIONS,  NEGOTIATIONS OR COMMUNICATIONS  INVOLVING OR RELATED TO ANY
PROPOSED RENEWAL EXTENSION, AMENDMENT, MODIFICATION,  RESTRUCTURE,  FORBEARANCE,
WORKOUT, OR ENFORCEMENT OF THE TRANSACTIONS CONTEMPLATED HEREBY OR BY THE SURETY
AGREEMENT.

     20. Surety hereby agrees that it will,  within thirty (30) days of the date
of this  Agreement,  file all  agreements  and/or  documents  required to record
Surety's interest  (ownership or otherwise) in the Patent Rights with the United
States Patent and Trademark Office.

     IN WITNESS  WHEREOF,  the parties hereto have executed this Patent Security
Agreement, under seal, the day and year first above written.


                                 SURETY:
                                 BLONDER TONGUE INVESTMENT COMPANY



                                 By: /s/ James A. Luksch
                                     -------------------------------------------
                                     James A. Luksch, President and CEO



                                                                (Corporate Seal)

                                 Address:  c/o Blonder Tongue Laboratories, Inc.
                                           One Jake Brown Road
                                           Old Bridge, NJ 08857
                                           Attn:   President


APPROVED AND ACCEPTED:
COMMERCE BANK, N. A.


By: /s/ Kurt J. Fuoti
    -------------------------------------
    Kurt J. Fuoti, Vice President




                                       5


                            CORPORATE ACKNOWLEDGMENT
                            ------------------------



UNITED STATES OF AMERICA                    :
COMMONWEALTH OF PENNSYLVANIA                : SS
COUNTY OF PHILADELPHIA                      :

     On this 20th day of March,  2002,  before me personally  appeared  JAMES A.
LUKSCH,  to me known  and  being  duly  sworn,  deposes  and says that he is the
President  and  CEO  of  BLONDER  TONGUE  INVESTMENT  COMPANY,  the  corporation
described in the foregoing Agreement; that he knows the seal of the corporation;
that the seal so affixed to the Agreement is such corporate seal; that he signed
the  Agreement and affixed the seal of the  corporation  thereto as such officer
pursuant to the authority vested in him by law; that the within Agreement is the
voluntary act of such corporation; and he/she desires the same to be recorded as
such.


                                            ------------------------------------
                                            Notary Public

                                            My Commission Expires:



                     SCHEDULE A TO PATENT SECURITY AGREEMENT
                     ---------------------------------------

                  APPLICATION/                                 REGISTRATION
PATENTS           REGISTRATION NO.          COUNTRY                DATE
- -------           ----------------          -------                ----





                     EXHIBIT 1 TO PATENT SECURITY AGREEMENT
                     --------------------------------------

                                PATENT ASSIGNMENT

     WHEREAS,   BLONDER  TONGUE  INVESTMENT  COMPANY,  a  Delaware   corporation
("Grantor"),  is the registered owner,  holder or user of: (i) the United States
Letters  Patents and the  inventions  which are  registered in the United States
Patent  and  Trademark  Office and set forth on  Schedule A hereto  (hereinafter
referred to  collectively  as the  "Patents");  (ii) the application for Letters
Patents and the inventions described and claimed therein set forth on Schedule A
hereto and any United  States  Letters  Patents  which may be issued upon any of
said applications  (hereinafter referred to collectively as the "Applications");
(iii) any  reissues,  extension,  division  or  continuation  of the  Patents or
Applications (such reissues, extension, divisions and continuations being herein
referred  to  collectively  as the  "Reissued  Patents");  and (iv)  all  future
royalties  or other  fees paid or  payments  made to Surety  in  respect  of the
Patents (hereinafter  referred to collectively as the "Royalties") (the Patents,
Applications and the Reissued Patents and the Royalties being herein referred to
collectively as the "Patent Rights").

     WHEREAS,   ____________________________  ("Grantee"),  having  a  place  of
business  at  ________________________________________________  is  desirous  of
acquiring the Patent Rights;

     NOW  THEREFORE,  for good and valuable  consideration,  receipt of which is
hereby  acknowledged,  and intending to be legally bound  hereby,  Grantor,  its
successors and assigns, does hereby transfer,  assign and set over unto Grantee,
its successors,  transferees  and assigns,  all of its present and future right,
title and interest in and to the Patent Rights and all proceeds  thereof and all
Surety's right, title, interest,  claims and demands that Surety has or may have
in profits and damages for past and future infringements of the Patent Rights.

     IN WITNESS WHEREOF, the undersigned has caused this Patent Assignment to be
executed as of the _____day of _________________, 200___.


                                                BLONDER TONGUE INVESTMENT
                                                COMPANY



Witness:  _____________________                 By:___________________________
                                                      As Attorney-in-fact




                            CORPORATE ACKNOWLEDGMENT



UNITED STATES OF AMERICA                    :
STATE OF ________________                   :        SS
COUNTY OF ____________________              :



     On this the ____ day of ________________,  200___ before me a Notary Public
for     the     said     County     and     State,      personally      appeared
__________________________________ known to me or satisfactorily proven to me to
be attorney-in-fact on behalf of BLONDER TONGUE INVESTMENT COMPANY  ("Grantor"),
and  he/she  acknowledged  to me  that  he/she  executed  the  foregoing  Patent
Assignment  on behalf of  Grantor,  and as the act and deed of  Grantor  for the
purposes therein contained.


     IN WITNESS WHEREOF, I hereunto set my hand and official seal.


                                                   -----------------------------
                                                        (Individual Notary)


My Commission Expires:

_______________, ________



                         SCHEDULE A TO PATENT ASSIGNMENT
                         -------------------------------


                  APPLICATION/                                  REGISTRATION
PATENTS           REGISTRATION NO.           COUNTRY                DATE
- -------           ----------------           -------                ----