Document:

EXHIBIT
        4.4

      WARRANT
        AGREEMENT

       

      Agreement
        made as of October 19, 2004, between GigaBeam Corporation, a Delaware
        corporation with offices at 14225-C Sullyfield Circle, Chantilly, Virginia
        20151
        (“Company”), and Continental Stock Transfer & Trust Company, a New York
        corporation with offices at 17 Battery Place, New York, New York 10004, a
        New
        York corporation, (herein called “Warrant Agent”).

       

      WHEREAS,
        the Company is engaged in a public offering of Common Stock and Warrants
        (“Public Offering”) and in connection therewith, has determined to issue and
        deliver up to (i) 1,495,000
        (including
        up to 195,000 that may be issued pursuant to the Underwriter’s over-allotment
        option) Redeemable Common Stock Purchase Warrants (“Public Warrants”) to the
        public investors and (ii) an
        aggregate of 130,000 Warrants to HCFP/Brenner Securities, LLC as representative
        of the several underwriters (“Representative”) or its respective designees
        (“Representative’s Warrants” and together with the Public Warrants, the
“Warrant(s)”), each of such Warrants evidencing the right of the holder thereof
        to purchase one share of the Company’s common stock, $.001 par value per share
        (“Common Stock”), for $5.05; and

       

      WHEREAS,
        the Company has filed with the Securities and Exchange Commission a Registration
        Statement (No. 333-116020) on Form SB-2 (“Registration Statement”), for the
        registration under the Securities Act of 1933, as amended, of, among others,
        the
        Warrants and the Common Stock issuable upon exercise of the Warrants;
        and

       

      WHEREAS,
        the Company desires the Warrant Agent to act on behalf of the Company, and
        the
        Warrant Agent is willing to so act, in connection with the issuance,
        registration, transfer, exchange, redemption and exercise of the Warrants;
        and

       

      WHEREAS,
        the Company desires to provide for the form and provisions of the Warrants,
        the
        terms upon which they shall be issued and exercised, and the respective rights,
        limitation of rights, and immunities of the Company, the Warrant Agent, and
        the
        holders of the Warrants; and

       

      WHEREAS,
        all acts and things have been done and performed which are necessary to make
        the
        Warrants, when executed on behalf of the Company and countersigned by or
        on
        behalf of the Warrant Agent, as provided herein, the valid, binding and legal
        obligations of the Company, and to authorize the execution and delivery of
        this
        Agreement.

       

      NOW,
        THEREFORE, in consideration of the mutual agreements herein contained, the
        parties hereto agree as follows:

       

      1.   Appointment
        of Warrant Agent.
        The
        Company hereby appoints the Warrant Agent to act as agent for the Company
        for
        the Warrants, and the Warrant Agent hereby accepts such appointment and agrees
        to perform the same in accordance with the terms and conditions set forth
        in
        this Agreement.

       

      
        
           

        

        
           

          
            

          

        

        
           

        

         

      

      2.   Warrants.

       

      2.1   Form
        of Warrant.
        Each
        Warrant certificate shall be issued in registered form only, shall be in
        substantially the form of Exhibit
        A
        hereto,
        the provisions of which are incorporated herein and shall be signed by, or
        bear
        the facsimile signature of, the Chairman of the Board, President and/or Vice
        President and Secretary or Assistant Secretary of the Company and shall bear
        a
        facsimile of the Company’s seal. In the event the person whose facsimile
        signature has been placed upon any Warrant certificate shall have ceased
        to be
        Chairman of the Board, Chief Executive Officer and/or President and Secretary
        or
        Assistant Secretary of the Company before such Warrant certificate is issued,
        it
        may be issued with the same effect as if he or she had not ceased to be such
        at
        the date of issuance. The Warrants represented by a Warrant certificate may
        not
        be exercised until such certificate has been countersigned by the Warrant
        Agent
        as provided in Section 2.3 hereof.

       

      2.2   Effect
        of Countersignature.
        Unless
        and until countersigned by the Warrant Agent pursuant to this Agreement,
        a
        Warrant certificate shall be invalid and of no effect.

       

      2.3   Events
        for Countersignature.
        The
        Warrant Agent shall countersign a Warrant certificate only upon the occurrence
        of either of the following events:

       

      (a)   if
        the
        Warrant certificate is to be issued in exchange or substitution for one or
        more
        previously countersigned Warrant certificates, as hereinafter provided,
        or

       

      (b)   if
        the
        Company instructs the Warrant Agent to do so.

       

      2.4   Registration.

       

      2.4.1   Warrant
        Register.
        The
        Warrant Agent shall maintain books (“Warrant Register”), for the registration of
        original issuance and the registration of transfer of the Warrants. Upon
        the
        initial issuance of the Warrants, the Warrant Agent shall issue and register
        the
        Warrants in the names of the respective holders thereof in such denominations
        and otherwise in accordance with instructions delivered to the Warrant Agent
        by
        the Company.

       

      2.4.2   Registered
        Holder.
        Prior
        to due presentment for registration of transfer of any Warrant certificate,
        the
        Company and the Warrant Agent may deem and treat the person in whose name
        such
        Warrant certificate shall be registered upon the Warrant Register (“registered
        holder”), as the absolute owner of such Warrant and of each Warrant represented
        thereby (notwithstanding any notation of ownership or other writing on the
        Warrant certificate made by anyone other than the Company or the Warrant
        Agent),
        for the purpose of any exercise thereof, and for all other purposes, and
        neither
        the Company nor the Warrant Agent shall be affected by any notice to the
        contrary.

       

      2.5   Detachability
        of Warrants.
        The
        Warrant Agent understands that until the completion of the Public Offering,
        the
        Warrants may only be purchased and sold together with the Common Stock and,
        upon
        completion of the Public Offering, are immediately separately
        transferable.

       

      
        
           

        

        
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      3.   Terms
        and Exercise of Warrants.

       

      3.1   Warrant
        Price.
        Each
        Warrant certificate shall, when countersigned by the Warrant Agent, entitle
        the
        registered holder thereof, subject to the provisions of such Warrant certificate
        and of this Warrant Agreement, to purchase from the Company the number of
        shares
        of Common Stock stated therein, at the price of $5.05 per whole share, subject
        to the adjustments provided in Section 4 hereof. The term “Warrant Price” as
        used in this Warrant Agreement refers to the price per share at which Common
        Stock may be purchased at the time a Warrant is exercised.

       

      3.2   Duration
        of Warrants.
        A
        Warrant may be exercised only during the period (“Exercise Period”) commencing
        on October 13, 2004, and terminating on the earlier of October 13, 2009,
        or the
        date fixed for redemption of the Warrant as provided in Section 6 of this
        Agreement (“Expiration Date”). Each Warrant not exercised on or before its
        expiration date shall become void, and all rights thereunder and all rights
        in
        respect thereof under this Agreement shall cease at the close of business
        on its
        Expiration Date. The Company in its sole discretion may extend the duration
        of
        the Warrants by delaying the Expiration Date.

       

      3.3   Exercise
        of Warrants.

       

      3.3.1   Payment.
        A
        Warrant, when countersigned by the Warrant Agent, may be exercised by the
        registered holder thereof by surrendering the certificate representing such
        Warrant, at the office of the Warrant Agent, or at the office of its successor
        as Warrant Agent, in the Borough of Manhattan, City and State of New York,
        with
        the purchase form, as set forth on the Warrant certificate and in substantially
        the form of Exhibit
        A
        hereto,
        duly executed, and by paying in full, in lawful money of the United States,
        in
        cash, good certified check or bank draft payable to the order of the Company,
        the Warrant Price for each full share of Common Stock as to which the Warrant
        is
        exercised and any and all applicable taxes due in connection with the exercise
        of the Warrant, the exchange of the Warrant for the Common Stock, and the
        issuance of the Common Stock.

       

      3.3.2   Issuance
        of Certificates.
        As soon
        as practicable after the exercise of any Warrant and the clearance of the
        funds
        in payment of the Warrant Price, the Company shall issue to the registered
        holder of such Warrant a certificate or certificates for the number of full
        shares of Common Stock to which he is entitled, registered in such name or
        names
        as may be directed by him, and if such Warrant shall not have been exercised
        in
        full, a new countersigned Warrant certificate for the number of shares as
        to
        which such Warrant shall not have been exercised. Notwithstanding the foregoing,
        the Company shall not be obligated to deliver any securities pursuant to
        the
        exercise of a Warrant unless a registration statement under the Securities
        Act
        of 1933 with respect to the securities is effective. Warrants may not be
        exercised by, or securities issued to, any registered holder in any state
        in
        which such exercise would be unlawful. 

       

      
        
           

        

        
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      3.3.3   Valid
        Issuance.
        All
        shares of Common Stock issued upon the proper exercise of a Warrant in
        conformity with this Agreement shall be validly issued.

       

      3.3.4   Date
        of Issuance.
        Each
        person in whose name any such certificate for shares of Common Stock is issued
        shall for all purposes be deemed to have become the holder of record of such
        shares on the date on which the Warrant certificate was surrendered and payment
        of the Warrant Price was made, irrespective of the date of delivery of such
        certificate, except that, if the date of such surrender and payment is a
        date
        when the stock transfer books of the Company are closed, such person shall
        be
        deemed to have become the holder of such shares at the close of business
        on the
        next succeeding date on which the stock transfer books are open.

       

      3.3.5   Warrant
        Solicitation and Warrant Solicitation Fee.

       

      (a)   The
        Company has engaged the Representative, on a non-exclusive basis, as its
        agent
        for the solicitation of the exercise of the Warrants. The Company, at its
        cost,
        will (i) assist
        the Representative with respect to such solicitation, if requested by the
        Representative and (ii) provide
        to the Representative, and direct the Company’s transfer and warrant agent to
        deliver to the Representative, lists of the record, and to the extent known,
        beneficial owners of the Company’s Warrants. Accordingly, the Company hereby
        instructs the Warrant Agent to cooperate with the Representative in every
        respect in connection with the Representative’s solicitation activities,
        including, but not limited to, providing to the Representative, at the Company’s
        cost, a list of record and beneficial holders of the Warrants and circulating
        a
        prospectus or offering circular disclosing the compensation arrangements
        referenced in Section 3.3.5(b) to holders of the Warrants at the time of
        exercise of the Warrants. In addition to the conditions set forth in Section
        3.3.5(b), the Representative shall accept payment of the warrant solicitation
        fee provided in Section 3.3.5(b) only if it has provided bona fide services
        in
        connection with the exercise of the Warrants. In addition to soliciting,
        either
        orally or in writing, the exercise of Warrants by a Warrant holder, such
        services also may include disseminating information, either orally or in
        writing, to Warrant holders about the Company or the market for the Company’s
        securities, or assisting in the processing of the exercise of
        Warrants.

       

      (b)   In
        each
        instance in which a Warrant is exercised, the Warrant Agent shall promptly
        give
        written notice of such exercise to the Company and the Representative (“Warrant
        Agent’s Exercise Notice”). If, upon the exercise of any Warrant after the first
        anniversary of the effective date of the Registration Statement, (i) the
        market price of the Company’s Common Stock is greater than the Warrant Price,
(ii) disclosure
        of compensation arrangements was made both at the time of the original offering
        and at the time of exercise (by delivery of the Prospectus or as otherwise
        required by applicable law, rule or regulation), (iii) the
        exercise of the Warrant was solicited by the Representative, (iv) the
        Warrant was not held in a discretionary account, (v) the
        solicitation of the exercise of the Warrant was not in violation of Regulation
        M
        (as such rule or any successor rule may be in effect as of such time of
        exercise) promulgated under the Securities Exchange Act of 1934, and (vi)
        the
        Representative is a member of the National Association of Securities Dealers,
        Inc., then the Warrant Agent, simultaneously with the issuance of the common
        stock underlying the Warrant(s), shall, on behalf of the Company, pay from
        the
        proceeds received upon exercise of the Warrant(s), a fee of 5% of the Warrant
        Price to the Representative in accordance with its actual solicitation of
        a
        Warrant holder, provided that the Representative delivers to the Warrant
        Agent
        within three (3) business days from the date on which the Representative
        received the Warrant Agent’s Exercise Notice, a certificate that the conditions
        set forth in the preceding clauses (iii), (iv) and (v) have been satisfied.
        The
        Representative and the Company may, at any time during business hours, examine
        the records of the Warrant Agent, including its ledger of original Warrant
        certificates returned to the Warrant Agent upon exercise of Warrants.

       

      (c)   The
        provisions of this Section 3.3.5 may not be modified, amended or deleted
        without the prior written consent of the Representative.

       

      
        
           

        

        
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      4.   Adjustments.

       

      4.1   Stock
        Dividends - Split-Ups.
        If
        after the date hereof, and subject to the provisions of Section 4.5, the
        number
        of outstanding shares of Common Stock is increased by a stock dividend payable
        in shares of Common Stock or by a split-up of shares of Common Stock or other
        similar event, then, on the effective date thereof, the number of shares
        issuable on exercise of each Warrant shall be increased in proportion to
        such
        increase in outstanding shares and the then applicable Warrant Price shall
        be
        correspondingly decreased.

       

      4.2   Aggregation
        of Shares.
        If
        after the date hereof, and subject to the provisions of Section 4.5, the
        number
        of outstanding shares of Common Stock is decreased by a consolidation,
        combination or reclassification of shares of Common Stock or other similar
        event, then, upon the effective date of such consolidation, combination or
        reclassification, the number of shares issuable on exercise of each Warrant
        shall be decreased in proportion to such decrease in outstanding shares and
        the
        then applicable Warrant Price shall be correspondingly increased.

       

      4.3   Replacement
        of Securities Upon Reorganization, etc.
        If after
        the date hereof any capital reorganization or reclassification of the Common
        Stock of the Company, or consolidation or merger of the Company with another
        corporation, or the sale of all or substantially all of its assets to another
        corporation or other similar event shall be effected, then, as a condition
        of
        such reorganization, reclassification, consolidation, merger, or sale, lawful
        and fair provision shall be made whereby the Warrant holders shall thereafter
        have the right to purchase and receive, upon the basis and upon the terms
        and
        conditions specified in the Warrants and in lieu of the shares of Common
        Stock
        of the Company immediately theretofore purchasable and receivable upon the
        exercise of the rights represented thereby, such shares of stock, securities,
        or
        assets as may be issued or payable with respect to or in exchange for the
        number
        of outstanding shares of such Common Stock equal to the number of shares
        of such
        stock immediately theretofore purchasable and receivable upon the exercise
        of
        the rights represented by the Warrants, had such reorganization,
        reclassification, consolidation, merger, or sale not taken place and in such
        event appropriate provision shall be made with respect to the rights and
        interests of the Warrant holders to the end that the provisions hereof
        (including, without limitation, provisions for adjustments of the Warrant
        Price
        and of the number of shares purchas-able upon the exercise of the Warrants)
        shall thereafter be applicable, as nearly as may be in relation to any share
        of
        stock, securities, or assets thereafter deliver-able upon the exercise hereof.
        The Company shall not effect any such consolidation, merger, or sale unless
        prior to the consummation thereof the successor corporation (if other than
        the
        Company) resulting from such consolidation or merger, or the corporation
        purchasing such assets, shall assume by written instrument executed and
        delivered to the Warrant Agent the obligation to deliver to the Warrant holders
        such shares of stock, securities, or assets as, in accordance with the foregoing
        provisions, such holders may be entitled to purchase.

       

      
        
           

        

        
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      4.4   Notices
        of Changes in Warrant.
        Upon
        every adjustment of the Warrant Price or the number of shares issuable on
        exercise of a Warrant, the Company shall give written notice thereof to the
        Warrant Agent, which notice shall state the Warrant Price resulting from
        such
        adjustment and the increase or decrease, if any, in the number of shares
        purchasable at such price upon the exercise of a Warrant, setting forth in
        reasonable detail the method of calculation and the facts upon which such
        calculation is based. Upon the occurrence of any event specified in Sections
        4.1, 4.2, or 4.3, then, in any such event, the Company shall give written
        notice
        in the manner set forth above of the record date for such dividend,
        distribution, or subscription rights, or the effective date of such
        reorganization, reclassification, con-solidation, merger, sale, dissolution,
        liquidation, winding up or issuance. Such notice shall also specify the date
        as
        of which the holders of Common Stock of record shall participate in such
        dividend, distribution, or subscription rights, or shall be entitled to exchange
        their Common Stock for stock, securities, or other assets deliverable upon
        such
        reorganization, reclassification, consolidation, merger, sale, dissolution,
        liquidation, winding up or issuance. Failure to give such notice, or any
        defect
        therein, shall not affect the legality or validity of such event.

       

      4.5   No
        Fractional Shares.
        Notwithstanding any provision contained in this Warrant Agreement to the
        contrary, the Company shall not issue fractional shares upon exercise of
        Warrants. If, by reason of any adjustment made pursuant to this Section 4,
        the holder of any Warrant would be entitled, upon the exercise of such Warrant,
        to receive a fractional interest in a share, the number of shares of Common
        Stock to be received shall be rounded off to the nearest whole
        number.

       

      4.6   Form
        of Warrant.
        The
        form of Warrant need not be changed because of any adjustment pursuant to
        this
        Section 4, and Warrants issued after such adjustment may state the same Warrant
        Price and the same number of shares as is stated in the Warrants initially
        issued pursuant to this Agreement. However, the Company may at any time in
        its
        sole discretion make any change in the form of Warrant that the Company may
        deem
        appropriate and that does not affect the substance thereof, and any Warrant
        thereafter issued or countersigned, whether in exchange or substitution for
        an
        outstanding Warrant or otherwise, may be in the form as so changed.

       

      5.   Transfer
        and Exchange of Warrants.

       

      5.1   Registration
        of Transfer.
        The
        Warrant Agent shall register the transfer, from time to time, of any outstanding
        Warrant upon the Warrant Register, upon surrender of a Warrant certificate
        for
        transfer, properly endorsed with signatures properly guaranteed and accompanied
        by appropriate instructions for transfer. Upon any such transfer, a new Warrant
        certificate representing an equal aggregate number of Warrants shall be issued
        and the old Warrant certificate shall be canceled by the Warrant Agent. The
        Warrant certificate so canceled shall be delivered by the Warrant Agent to
        the
        Company from time to time upon request.

       

      
        
           

        

        
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      5.2   Procedure
        for Surrender of Warrants.
        Warrant
        certificates may be surrendered to the Warrant Agent, together with a written
        request for exchange, and thereupon the Warrant Agent shall issue in exchange
        therefor one or more new Warrant certificates as requested by the registered
        holder of the Warrant certificates so surrendered, representing an equal
        aggregate number of Warrants; provided, however, that in the event that a
        Warrant certificate surrendered for transfer bears a restrictive legend,
        the
        Warrant Agent shall not cancel such Warrant certificate and issue new Warrant
        certificates in exchange therefor until the Warrant Agent has received an
        opinion of counsel for the Company stating that such transfer may be made
        and
        indicating whether the new Warrant certificates also must bear a restrictive
        legend.

       

      5.3   Fractional
        Warrants.
        The
        Warrant Agent shall not be required to effect any registration of transfer
        or
        exchange which will result in the issuance of a warrant certificate for a
        fraction of a warrant. The number of Warrants to be delivered shall be rounded
        off to the nearest whole number.

       

      5.4   Service
        Charges.
        No
        service charge shall be made for any exchange or registration of transfer
        of
        Warrants.

       

      5.5   Warrant
        Execution and Countersignature.
        The
        Warrant Agent is hereby authorized to countersign and to deliver, in accordance
        with the terms of this Agreement, the Warrants required to be issued pursuant
        to
        the provisions hereof, and the Company, whenever required by the Warrant
        Agent,
        will supply the Warrant Agent with Warrant certificates duly executed on
        behalf
        of the Company for such purpose.

       

      6.   Redemption.

       

      6.1   Redemption.
        Not
        less than all of the outstanding Warrants may be redeemed, at the option
        of the
        Company, prior to the Expiration Date, at the office of the Warrant Agent,
        upon
        the notice referred to in Section 6.2, at the price of $.05 per Warrant
        (“Redemption Price”), provided that (i) during
        the first three months after consummation of the Public Offering, the
        last
        sale price of the Common Stock has been at least one hundred and ninety percent
        (190%) of the then effective exercise price of the Public Warrants on each
        of
        the fifteen (15) consecutive trading days ending within three business days
        prior to the date on which notice of redemption is given or (ii) thereafter,
        the
        last sale price of the Common Stock has been at least one hundred and fifty
        percent (150%) of the then effective exercise price of the Public Warrants
        on
        each of the fifteen (15) consecutive trading days ending within three business
        days prior to the date on which notice of redemption is given (the satisfaction
        of the applicable foregoing condition shall be certified by the Company),
        and
(iii) the
        Company has obtained the prior written consent of the Representative. The
        provisions of this Section 6.1 may not be modified, amended or deleted without
        the prior written consent of the Representative.

       

      
        
           

        

        
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      6.2   Date
        Fixed for, and Notice of, Redemption.
        In the
        event the Company shall elect to redeem all or any part of the outstanding
        Warrants, the Company shall fix a date for the redemption. Notice of redemption
        shall be mailed by first class mail, postage prepaid, by the Company or the
        Company’s agent at its direction not less than 30 days from the date fixed for
        redemption to the registered holders of the outstanding Warrants to be redeemed
        at their last address as they shall appear on the registration books. Any
        notice
        mailed in the manner herein provided shall be conclusively presumed to have
        been
        duly given whether or not the registered holder received such
        notice.

       

      6.3   Exercise
        After Notice of Redemption.
        The
        outstanding Warrants may be exercised in accordance with Section 3
        of this
        Agreement at any time after notice of redemption shall have been given by
        the
        Company pursuant to Section 6.2 hereof and prior to the date fixed
        for
        redemption. On and after the redemption date, the record holder of the
        outstanding Warrants shall have no further rights except to receive, upon
        surrender of the outstanding Warrants, the Redemption Price.

       

      6.4   Outstanding
        Warrants Only.
        The
        Company understands that the redemption rights provided for by this Section
        6
        apply only to outstanding Warrants. To the extent a person holds rights to
        purchase Warrants, such purchase rights shall not be extinguished by redemption.
        However, once such purchase rights are exercised, the Company may redeem
        the
        Warrants issued upon such exercise provided that the criteria for redemption
        is
        met. The provisions of this Section 6.4 may not be modified, amended or deleted
        without the prior written consent of the Representative.

       

      7.   Other
        Provisions Relating to Rights of Holders of Warrants.

       

      7.1   No
        Rights as Stockholder.
        A
        Warrant does not entitle the registered holder thereof to any of the rights
        of a
        stockholder of the Company, including, without limitation, the right to receive
        dividends, or other distributions, exercise any preemptive rights to vote
        or to
        consent or to receive notice as stockholders in respect of the meetings of
        stockholders or the election of directors of the Company or any other
        matter.

       

      7.2   Lost,
        Stolen, Mutilated, or Destroyed Warrants.
        If any
        Warrant certificate is lost, stolen, mutilated, or destroyed, the Company
        and
        the Warrant Agent may, on such terms as to indemnity or otherwise as they
        may in
        their discretion impose (which shall, in the case of a mutilated Warrant
        certificate, include the surrender thereof), issue a new Warrant certificate
        of
        like denomination, tenor, and date as the Warrant certificate so lost, stolen,
        mutilated, or destroyed. Any such new Warrant certificate shall constitute
        a
        substitute contractual obligation of the Company, whether or not the allegedly
        lost, stolen, mutilated, or destroyed Warrant certificate shall be at any
        time
        enforceable by anyone.

       

      7.3   Reservation
        of Common Stock.
        The
        Company shall at all times reserve and keep available a number of its authorized
        but unissued shares of Common Stock that will be sufficient to permit the
        exercise in full of all outstanding Warrants issued pursuant to this
        Agreement.

       

      
        
           

        

        
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      7.4   Registration
        of Common Stock.
        The
        Company agrees that, during such time as the Public Warrants and
        Representative’s Warrants remain outstanding and exercisable, it shall file with
        the Securities and Exchange Commission a post-effective amendment to the
        Registration Statement, if possible, or a new registration statement, to
        maintain registration under the Securities Act of 1933 of such Warrants and
        shares underlying such Warrants, and it shall take such action as is necessary
        to qualify for sale, in those states in which the Warrants were initially
        offered by the Company, the Common Stock issuable upon exercise of the Warrants.
        The Company shall maintain the effectiveness of such registration statement
        and
        keep current a prospectus thereunder and maintain such qualification until
        the
        expiration of the Public Warrants and the Representative’s Warrants in
        accordance with the provisions of this Agreement. The provisions of this
        Section
        7.4 may not be modified, amended or deleted without the prior written consent
        of
        the Representative.

       

      8.   Concerning
        the Warrant Agent and Other Matters.

       

      8.1   Payment
        of Taxes.
        The
        Company will from time to time promptly pay all taxes and charges that may
        be
        imposed upon the Company or the Warrant Agent in respect of the issuance
        or
        delivery of shares of Common Stock upon the exercise of Warrants, but the
        Company shall not be obligated to pay any transfer taxes in respect of the
        Warrants or such shares.

       

      8.2   Resignation,
        Consolidation, or Merger of Warrant Agent.

       

      8.2.1   Appointment
        of Successor Warrant Agent.
        The
        Warrant Agent, or any successor to it hereafter appointed, may resign its
        duties
        and be discharged from all further duties and liabilities (other than those
        incurred prior to such resignation or discharge) hereunder after giving sixty
        (60) days’ notice in writing to the Company. If the office of the Warrant Agent
        becomes vacant by resignation or incapacity to act or otherwise, the Company
        shall appoint in writing a successor Warrant Agent in place of the Warrant
        Agent. If the Company shall fail to make such appointment within a period
        of 30
        days after it has been notified in writing of such resignation or incapacity
        by
        the Warrant Agent or by a holder of Warrants (who shall, with such notice,
        submit his Warrant for inspection by the Company), then the holder of any
        Warrant may apply to the Supreme Court of the State of New York for the County
        of New York for the appointment of a successor Warrant Agent. Any successor
        Warrant Agent, whether appointed by the Company or by such court, shall be
        a
        corporation organized, existing and in good standing and authorized under
        the
        laws of the state in which it was incorporated to exercise corporate trust
        powers, shall maintain an office in the Borough of Manhattan, City and State
        of
        New York for the transfer of the Warrants and, if not incorporated in the
        State
        of New York, shall be authorized to do business in the State of New York
        as a
        foreign corporation, and subject to supervision or examination by federal
        or
        state authority and shall be authorized to serve as Warrant Agent for the
        Warrants under the Securities Exchange Act of 1934, as amended. After
        appointment, any successor Warrant Agent shall be vested with all the authority,
        powers, rights, immunities, duties, and obligations of its predecessor Warrant
        Agent with like effect as if originally named as Warrant Agent hereunder,
        without any further act or deed; but if for any reason it becomes necessary
        or
        appropriate, the predecessor Warrant Agent shall execute and deliver, at
        the
        expense of the Company, an instrument transferring to such successor Warrant
        Agent all the authority, powers, and rights of such predecessor Warrant Agent
        hereunder; and upon request of any successor Warrant Agent the Company shall
        make, execute, acknowledge, and deliver any and all instruments in writing
        for
        more fully and effectually vesting in and confirming to such successor Warrant
        Agent all such authority, powers, rights, immunities, duties, and
        obligations.

       

      
        
           

        

        
          9

          
            

          

        

        
           

        

         

      

      8.2.2   Notice
        of Successor Warrant Agent.
        In the
        event a successor Warrant Agent shall be appointed, the Company shall give
        notice thereof to the predecessor Warrant Agent and the transfer agent for
        the
        Common Stock not later than the effective date of any such
        appointment.

       

      8.2.3   Merger
        or Consolidation of Warrant Agent.
        Any
        corporation into which the Warrant Agent may be merged or with which it may
        be
        consolidated or any corporation resulting from any merger or consolidation
        to
        which the Warrant Agent shall be a party, if it shall be eligible to serve
        as
        Warrant Agent under Section 8.2.1, shall be the successor Warrant Agent under
        this Agreement without any further act.

       

      8.3   Fees
        and Expenses of Warrant Agent.

       

      8.3.1   Remuneration.
        The
        Company agrees to pay the Warrant Agent reasonable remuneration for its services
        as such Warrant Agent hereunder and will reimburse the Warrant Agent upon
        demand
        for all expenditures that the Warrant Agent may reasonably incur in the
        execution of its duties hereunder.

       

      8.3.2   Further
        Assurances.
        The
        Company agrees to perform, execute, acknowledge, and deliver or cause to
        be
        performed, executed, acknowledged, and delivered all such further and other
        acts, instruments, and assurances as may reason-ably be required by the Warrant
        Agent for the carrying out or performing of the provisions of this
        Agreement.

       

      8.4   Liability
        of Warrant Agent.

       

      8.4.1   Reliance
        on Company Statement.
        Whenever in the performance of its duties under this Warrant Agreement, the
        Warrant Agent shall deem it necessary or desirable that any fact or matter
        be
        proved or established by the Company prior to taking or suffering any action
        hereunder, such fact or matter (unless other evidence in respect thereof
        be
        herein specifically prescribed) may be deemed to be conclusively proved and
        established by a statement signed by the President of the Company and delivered
        to the Warrant Agent. The Warrant Agent may rely upon such statement for
        any
        action taken or suffered in good faith by it pursuant to the provisions of
        this
        Agreement.

       

      8.4.2   Indemnity.
        The
        Warrant Agent shall be liable hereunder only for its own negligence or willful
        misconduct. The Company agrees to indemnify the Warrant Agent and save it
        harmless against any and all liabilities, including judgments, costs and
        reasonable counsel fees, for anything done or omitted by the Warrant Agent
        in
        the execution of this Agreement except as a result of the Warrant Agent’s
        negligence, willful misconduct, or bad faith.

       

      
        
           

        

        
          10

          
            

          

        

        
           

        

      

       

      8.4.3   Exclusions.
        The
        Warrant Agent shall have no responsibility with respect to the validity of
        this
        Agreement or with respect to the validity or execution of any Warrant (except
        its countersignature thereof); nor shall it be responsible for any breach
        by the
        Company of any covenant or condition contained in this Agreement or in any
        Warrant; nor shall it be responsible to make any adjustments required under
        the
        provisions of Section 4 hereof or responsible for the manner, method, or
        amount
        of any such adjustment or the ascertaining of the existence of facts that
        would
        require any such adjustment; nor shall it by any act hereunder be deemed
        to make
        any representation or warranty as to the authorization or reservation of
        any
        shares of Common Stock to be issued pursuant to this Agreement or any Warrant
        or
        as to whether any shares of Common Stock will when issued be valid and fully
        paid and nonassessable. 

       

      8.5   Acceptance
        of Agency.
        The
        Warrant Agent hereby accepts the agency established by this Agreement and
        agrees
        to perform the same upon the terms and conditions herein set forth and among
        other things, shall account promptly to the Company with respect to Warrants
        exercised and concurrently account for, and pay to the Company, all moneys
        received by the Warrant Agent for the purchase of shares of the Company’s Common
        Stock through the exercise of Warrants.

       

      9.   Miscellaneous
        Provisions.

       

      9.1   Successors.
        All the
        covenants and provisions of this Agreement by or for the benefit of the Company
        or the Warrant Agent shall bind and inure to the benefit of their respective
        successors and assigns.

       

      9.2   Notices.
        Any
        notice, statement or demand authorized by this Warrant Agreement to be given
        or
        made by the Warrant Agent or by the holder of any Warrant to or by the Company
        shall be sufficiently given or made if sent by certified mail, or private
        courier service, postage prepaid, addressed (until another address is filed
        in
        writing by the Company with the Warrant Agent), as follows:

      

      GigaBeam
        Corporation

      14225-C
        Sullyfield Circle

      Chantilly,
        Virginia 20151

      Attn: Louis
        S.
        Slaughter, Chief Executive Officer

      

      with
        a
        copy to:

      

      Blank
        Rome LLP

      405
        Lexington Avenue

      New
        York,
        New York 10174

      Attn:
        Robert J. Mittman, Esq.

      

      Any
        notice, statement or demand authorized by this Agreement to be given or made
        by
        the holder of any Warrant or by the Company to or on the Warrant Agent shall
        be
        sufficiently given or made if sent by certified mail or private courier service,
        postage prepaid, addressed (until another address is filed in writing by
        the
        Warrant Agent with the Company), as follows:

      

      
        
           

        

        
          11

          
            

          

        

        
           

        

         

      

      Continental
        Stock Transfer & Trust Company

      17
        Battery Place

      New
        York,
        New York 10004

       

      9.3   Applicable
        law; Jurisdiction.
        The
        validity, interpretation, and performance of this Agreement and of the Warrants
        shall be governed in all respects by the law of the State of New York, without
        giving effect to principles of conflicts of law. The Company hereby agrees
        that
        any action, proceeding or claim against it arising out of or relating in
        any way
        to this Agreement shall be brought and enforced in the courts of the State
        of
        New York or the United States District Court for the Southern District of
        New
        York, and irrevocably submits to such jurisdiction, which jurisdiction shall
        be
        exclusive. The Company hereby waives any objection to such exclusive
        jurisdiction and that such courts represent an inconvenience forum. Any such
        process or summons to be served upon the Company may be served by transmitting
        a
        copy thereof by registered or certified mail, return receipt requested, postage
        prepaid, addressed to it at the address set forth in Section 9.2 hereof.
        Such
        mailing shall be deemed personal service and shall be legal and binding upon
        the
        Company in any action, proceeding or claim. 

       

      9.4   Persons
        Having Rights Under This Agreement.
        Nothing
        in this Agreement expressed and nothing that may be implied from any of the
        provisions hereof is intended, or shall be construed, to confer upon, or
        give
        to, any person or corporation other than the parties hereto and the registered
        holders of the Warrants and, for the purposes of Sections 3.3.5, 6.1 through
        6.4
        and 7.4 hereof, the Representative, any right, remedy, or claim under or
        by
        reason of this Warrant Agreement or of any covenant, condition, stipulation,
        promise, or agreement hereof. The Representative shall be deemed to be a
        third-party beneficiary of this Agreement with respect to such Sections.
        All
        covenants, conditions, stipulations, promises, and agreements contained in
        this
        Warrant Agreement shall be for the sole and exclusive benefit of the parties
        hereto (and the Representative to the extent set forth above) and their
        successors and assigns and of the registered holders of the
        Warrants.

       

      9.5   Examination
        of the Warrant Agreement.
        A copy
        of this Agreement shall be available at all reasonable times at the office
        of
        the Warrant Agent in the Borough of Manhattan, City and State of New York,
        for
        inspection by the registered holder of any Warrant. The Warrant Agent may
        require any such holder to submit his or her Warrant for inspection by
        it.

       

      9.6   Counterparts.
        This
        Agreement may be executed in any number of counterparts and each of such
        counterparts shall for all purposes be deemed to be an original, and all
        such
        counterparts shall together constitute but one and the same
        instrument.

       

      9.7   Effect
        of Headings.
        The
        Section headings herein are for convenience only and are not part of this
        Warrant Agreement and shall not affect the interpretation thereof.

      
        
           

        

        
          12

          
            

          

        

        
           

        

      

       

      IN
        WITNESS WHEREOF, this Agreement has been duly executed by the parties hereto
        under their respective corporate seals as of the day and year first above
        written.

      

      
        	
                 

                Attest:

                 

                 

                 

                /s/
                  Christin R. Cerullo

                Name:
                  Christin R. Cerullo

                Title:

                 

              	 	
                 

                GIGABEAM
                  CORPORATION

                 

                 

                 

                By:/s/
                  Louis S. Slaughter

                Name: Louis
                  S. Slaughter

                Title: Chief
                  Executive Officer

                 

              
	 	 	 
	
                 

                Attest:

                 

                 

                 

                /s/
                  Roger Bernhammer

                Name:
                  Roger Bernhammer

                Title:
                  Vice President

                 

              	 	
                 

                CONTINENTAL
                  STOCK TRANSFER

                & TRUST COMPANY

                 

                 

                 

                By:/s/
                  Felix Orihuela

                Name:
                  Felix Orihuela

                Title:
                  Vice President and Senior Account Executive

                 

              

      

      

      
        
           

        

        
          13EXHIBIT
      4.6

    AMENDMENT
      NO. 1 TO

    WARRANT
      AGREEMENT

    AMENDMENT
      NO. 1, dated as of May 5, 2005, to Warrant Agreement (“Warrant Agreement”) made
      as of January 28, 2005 and effective as of the OTC Listing Date (as defined
      in
      the Warrant Agreement) between GigaBeam Corporation, a Delaware corporation,
      with offices at 470 Springpark Place, Suite 900, Herndon, Virginia 20170
      (“Company”), and Continental Stock Transfer & Trust Company, a New York
      corporation, with offices at 17 Battery Place, New York, New York 10004
      (“Warrant Agent”).

    WHEREAS,
      in January and February 2005, the Company consummated a private placement of
      $2.5 million principal amount of its promissory notes and common stock purchase
      warrants (“January 2005 Warrants”); 

    WHEREAS,
      the Company agreed to use its best effort to cause the January 2005 Warrants
      to
      become (i) registered under Section 12(g) of the Exchange Act of 1934 and (ii)
      listed on the OTC Bulletin Board

    WHEREAS,
      the Company and the Warrant Agent entered into the Warrant Agreement with
      respect to the January 2005 Warrants;

    WHEREAS,
      the Company is currently engaged in a private placement (“Offering”) of its 10%
      Series A Redeemable Preferred Stock (“Preferred Stock”) and common stock
      purchase warrants (“May 2005 Warrants”) and has
      determined to use its best efforts to cause the May 2005
      Warrants to become (i) registered under Section 12(g) of the Exchange Act of
      1934 and (ii) listed on the OTC Bulletin Board; 

    WHEREAS,
      the May 2005 Warrants and the January 2005 Warrants are identical in form and
      substance; and

    WHEREAS,
      the Company desires that the Warrant Agreement be amended so as to include
      in
      its coverage the May 2005 Warrants and any other warrants (“Additional Identical
      Warrants”) hereafter issued that are identical in form and substance to the
      January 2005 Warrants and May 2005 Warrants.

    NOW,
      THEREFORE, in consideration of the mutual
      agreements herein contained, the parties hereto agree as follows:

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

       

    

    1.      Amendment
      to Warrant Agreement.  The parties agree that the Warrant Agreement is
      hereby immediately amended such that all references therein to the term
“Warrants” shall mean the January 2005 Warrants, the May 2005 Warrants and the
      Additional Identical Warrants.

    
                 
        IN WITNESS WHEREOF, this Amendment has been duly executed by the parties
        hereto as of the day and year first above written.

       

    

    
    

    
      	Attest:     	 	 
	 	GIGABEAM
              CORPORATION
	 
/s/
              Michael S. Greenberg	 
 	 
 
	 	By:  	/s/ Louis
              S. Slaughter
	 	
              
Name: 
              Louis S. Slaughter
	 	Title :   Chairman
              and CEO

    

    
      	 	 	 
	 	 
	Attest:  	CONTINENTAL
              STOCK TRANSFER & TRUST COMPANY
	 
/s/ Roger
              Bernhammer	 
 	 
 
	 	By:  	/s/ Steven
              Nelson    
	 	
              
Name:  Steven
              Nelson
	 	Title: 
               Chairman

    

    
      	 	 	 
	Attest:  	HCFP
              BRENNER SECURITIES LLC
	 
/s/
              Arthur J. Magee 	 
 	 
 
	 	By:  	/s/ Avraham
              Lipsker
	 	
              
Name: 
              Avraham Lipsker
	 	Title :  
              Managing Director

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