1 Exhibit 3.1 RESTATED CERTIFICATE OF INCORPORATION OF METRICOM, INC. 1. The Corporation's original Certificate of Incorporation was filed on October 24, 1991, under the name of Metricom (Delaware), Inc. 2. The Restated Certificate of Incorporation of said corporation as provided in Exhibit A hereto was duly adopted in accordance with the provisions of Section 242 and Section 245 of the General Corporation Law of the State of Delaware by the Board of Directors of the corporation. IN WITNESS WHEREOF, the undersigned has signed this certificate this 30th day of January 1998 and hereby affirms and acknowledges under penalty of perjury that the filing of this Restated Certificate of Incorporation is the act and deed of Metricom, Inc. METRICOM, INC. By: /s/ Robert P. Dilworth ----------------------------------- Robert P. Dilworth Chief Executive Officer STATE OF DELAWARE SECRETARY OF STATE DIVISION OF CORPORATIONS FILED 09:00 AM 02/02/1998 981041347 -- 2276962 1. 2 RESTATED CERTIFICATE OF INCORPORATION OF METRICOM, INC. 1. The name of this corporation is Metricom, Inc. 2. The address of the registered office of the corporation in the State of Delaware is 32 Loockerman Square, Suite L-100, City of Dover, County of Kent, and the name of the registered agent of the corporation in the State of Delaware at such address is The Prentice-Hall Corporation System, Inc. 3. The purpose of this corporation is to engage in any lawful act or activity for which a corporation may be organized under the General Corporation Law of the State of Delaware. A. The liability of the directors of the Corporation for monetary damages shall be eliminated to the fullest extent permissible under Delaware law. B. The Corporation is authorized to provide indemnification of agents (as defined in Section 145 of the Delaware General Corporation Law) for breach of duty to the Corporation and its stockholders through bylaw provisions, through agreements with the agents, and/or through stockholder resolutions, or otherwise, in excess of the indemnification otherwise permitted by Section 145 of the Delaware General Corporation Law. C. Any repeal or modification of this Article III shall be prospective and shall not affect the rights under this Article III in effect at the time of the alleged occurrence of any act or omission to act giving rise to liability or indemnification. IV. A. This corporation is authorized to issue two classes of stock to be designated, respectively, "Common Stock" and "Preferred Stock." The total number of shares which the corporation is authorized to issue is fifty-two million (52,000,000) shares. Fifty million (50,000,000) shares shall be Common Stock, each having a par value of one tenth of one cent ($0.001). Two million (2,000,000) shares shall be Preferred Stock, each having a par value of one tenth of one cent ($0.001). 1. 3 B. The Preferred Stock may be issued from time to time in one or more series. The Board of Directors is hereby authorized, by filing a certificate pursuant to the Delaware General Corporation Law, to fix or alter from time to time the designation, powers, preferences and rights of the shares of each such series and the qualifications, limitations or restrictions thereof, including without limitation the dividend rights, dividend rate, conversion rights, voting rights, rights and terms of redemption (including sinking fund provisions), redemption price or prices, and the liquidation preferences of any wholly unissued series of Preferred Stock, and to establish from time to time the number of shares constituting any such series and the designation thereof, or any of them (a "Preferred Stock Designation"); and to increase or decrease the number of shares of any series subsequent to the issuance of shares of that series, but not below the number of shares of such series then outstanding. In case the number of shares of any series shall be decreased in accordance with the foregoing sentence, the shares constituting such decrease shall resume the status that they had prior to the adoption of the resolution originally fixing the number of shares of such series. C. No share or shares of any series of Preferred Stock acquired by the Corporation by reason of redemption, purchase, conversion or otherwise shall be reissued as part of such series, and the Board of Directors is authorized, pursuant to Section 243 of the Delaware General Corporation Law, to retire any such share or shares. The retirement of any such share or shares shall not reduce the total authorized number of shares of Preferred Stock. V. For the management of the business and for the conduct of the affairs of the corporation, and in further definition, limitation and regulation of the powers of the corporation, of its directors and of its stockholders or any class thereof, as the case may be, it is further provided that: A. The management of the business and the conduct of the affairs of the corporation shall be vested in its Board of Directors. The number of directors which shall constitute the whole Board of Directors shall be fixed exclusively by one or more resolutions adopted from time to time by the Board of Directors. The directors shall be divided into three classes designated as Class I, Class II and Class III, respectively. Directors shall be assigned to each class in accordance with a resolution or resolutions adopted by the Board of Directors. At the first annual meeting of stockholders following the closing of the corporation's initial public offering pursuant to an effective registration statement under the Securities Act of 1933, as amended, covering the offer and sale of the Common Stock of the corporation (the "Initial Public Offering"), the term of office of the Class I directors shall expire and Class I directors shall be elected for a full term of three years. At the second annual meeting of stockholders following the closing of the Initial Public Offering, the term of office of the Class II directors shall expire and Class II directors shall be elected for a full term of three years. At the third annual meeting of stockholders following the closing of the Initial Public Offering, the term of office of the Class III directors shall expire and Class III directors shall be elected for a full term of three years. At each succeeding annual meeting of stockholders, directors shall be elected for a full term of three years to succeed the directors of the class whose terms expire at such annual meeting. 2. 4 Notwithstanding the foregoing provisions of this Article, each director shall serve until his successor is duly elected and qualified or until his death, resignation or removal. No decrease in the number of directors constituting the Board of Directors shall shorten the term of any incumbent director. Any vacancies on the Board of Directors resulting from death, resignation, disqualification, removal or other causes shall be filled by either (i) the affirmative vote of the holders of a majority of the voting power of the then-outstanding shares of voting stock of the corporation entitled to vote generally in the election of directors (the "Voting Stock") voting together as a single class; or (ii) by the affirmative vote of a majority of the remaining directors then in office, even though less than a quorum of the Board of Directors. Newly created directorships resulting from any increase in the number of directors shall, unless the Board of Directors determines by resolution that any such newly created directorship shall be filled by the stockholders, be filled only by the affirmative vote of the directors then in office, even though less than a quorum of the Board of Directors. Any director elected in accordance with the preceding sentence shall hold office for the remainder of the full term of the class of directors in which the new directorship was created or the vacancy occurred and until such director's successor shall have been elected and qualified. Notwithstanding the foregoing, in the event of any vacancy on the Board of Directors resulting from the resignation, death, disability, removal or disqualification of any director serving on the Board of Directors both prior to and immediately after the closing of the transactions contemplated by the Common Stock Purchase Agreement, dated October 10, 1997, between the Company and the purchaser named therein, or any successor thereto, or successor of such successor (an "Independent Director"), a committee of the Board of Directors consisting of the remaining Independent Directors shall, pursuant to Section 141(a) of the Delaware General Corporation Law, fill such vacancy by a majority vote of such directors. Any director so elected by such committee shall be an "Independent Director" for purposes of this paragraph. B. The Bylaws may be altered or amended or new Bylaws adopted by the affirmative vote of at least sixty-six and two-thirds percent (66-2/3%) of the voting power of all of the then-outstanding shares of the Voting Stock. In furtherance and not in limitation of the power conferred by statute, the Board of Directors is expressly authorized to adopt, amend, supplement or repeal the Bylaws. C. The directors of the corporation need not be elected by written ballot unless the Bylaws so provide. D. No action shall be taken by the stockholders of the corporation except at an annual or special meeting of stockholders called in accordance with the Bylaws and no action shall be taken by the stockholders by written consent; provided, however, that notwithstanding anything to the contrary contained herein, the stockholders may act by without a meeting, without prior notice and without a vote solely in the election of directors to fill vacancies on the Board of Directors (other than a vacancy resulting from the resignation, death, disability, removal or disqualification of any Independent Director). 3. 5 E. Advance notice of stockholder nominations for the election of directors and of business to be brought by stockholders before any meeting of the stockholders of the corporation shall be given in the manner provided in the Bylaws of the corporation. F. Any director, or the entire Board of Directors, may be removed from office at any time (i) with cause by the affirmative vote of the holders of at least a majority of the voting power of all of the then-outstanding shares of the Voting Stock, voting together as a single class; or (ii) without cause by the affirmative vote of the holders of at least sixty-six and two-thirds percent (66-2/3%) of the voting power of all of the then-outstanding shares of the Voting Stock. VI. Notwithstanding any other provisions of this Certificate of Incorporation or any provision of law which might otherwise permit a lesser vote or no vote, but in addition to any affirmative vote of the holders of any particular class or series of the Voting Stock required by law, this Certificate of Incorporation or any Preferred Stock Designation, the affirmative vote of the holders of at least sixty-six and two-thirds percent (66-2/3%) of the voting power of all of the then-outstanding shares of the Voting Stock, voting together as a single class, shall be required to alter, amend or repeal Article V, Article VI or Article VIII. VII. The corporation is to have perpetual existence. VIII. The corporation reserves the right to amend, alter, change or repeal any provision contained in this Certificate of Incorporation, in the manner now or hereafter prescribed by statute, except as provided in Article VI of this Certificate, and all rights conferred upon the stockholders herein are granted subject to this right. 4.