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                                                                     EXHIBIT 4.4

THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"), NOR UNDER ANY STATE
SECURITIES LAWS, IN RELIANCE UPON EXEMPTIONS FROM REGISTRATION FOR NON-PUBLIC
OFFERINGS. NEITHER THIS WARRANT NOR THE SHARES OF COMMON STOCK ISSUABLE UPON
EXERCISE OF THIS WARRANT MAY BE SOLD OR TRANSFERRED UNLESS THIS WARRANT OR THE
SHARES ARE REGISTERED UNDER THE ACT AND UNDER APPLICABLE STATE SECURITIES LAWS
OR UNLESS THE COMPANY RECEIVES AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY
THAT AN EXEMPTION FROM REGISTRATION IS AVAILABLE.

Name of warrant holder                  University of Utah Research Foundation
Address                                 615 Arapeen Drive, Suite 110
                                        Salt Lake City, Utah 84108

Number of Shares of Common              33,189
Stock purchasable pursuant to this
Warrant
Exercise price                          $0.0150954 per Share
Expiration date                         July 1, 2007, 5:00 p.m. local time

                   WARRANT TO PURCHASE SHARES OF COMMON STOCK
                                       OF
                              CYBERKINETICS, INC.,
                             A DELAWARE CORPORATION

      This is to certify that, for value received, the warrant holder shown
above (the "Holder"), is entitled to purchase, subject to the provisions of,
this Warrant, from Cyberkinetics, Inc., a Delaware corporation (the "Company"),
at any time not later than the expiration time and date shown above, the number
of shares of common stock, $0.0001 par value per share ("Common Stock"), of the
Company shown above at the price shown above. The shares of Common Stock
deliverable upon such exercise are hereinafter sometimes referred to as the
"Shares".

     A. ISSUANCE OF WARRANT; CANCELLATION OF OLD WARRANTS. This Warrant is
issued in replacement of the Warrants dated January 2, 2001 and February 7, 2002
issued by Bionic Technologies, LLC, a Utah limited liability company ("Bionic"),
to the Holder (the "Old Warrants"). By its acceptance hereof, the Holder agrees
that the Old Warrants are hereby terminated and of no further force and effect,
and the Holder shall have no right to exercise such Warrants for Units (as
defined in the Old Warrants) or any other securities of Bionic or the Company.

      B. EXERCISE OF WARRANT. This Warrant may be exercised in whole only and
not for less than all Shares purchasable hereunder at any time after the date
hereof and ending no later than 5:00 p.m. local time at the Company's office on
the Expiration date shown above, by presentation and surrender hereof to the
Company and accompanied by payment of the Exercise Price for the Shares. Upon
receipt by the Company of this Warrant at the office of the Company together
with payment of the Exercise Price, the Holder shall be deemed to be the holder
of

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record of the Shares issuable upon such exercise, notwithstanding that the stock
transfer books of the Company shall then be closed or that certificates
representing such Shares shall not then be actually delivered to the Holder.

      C. RESERVATION OF SHARES. The Company hereby agrees that at all times
there shall be reserved for issuance and/or delivery upon exercise of this
Warrant such number of the Shares as shall be required for issuance or
delivery upon exercise of this Warrant.

      D. RIGHTS OF THE HOLDER. The Holder shall not, by virtue hereof, be
entitled to any rights of a stockholder in the Company, either at law or equity,
and the rights of the Holder are limited to those expressed in the Warrant and
are not enforceable against the Company except to the extent set forth herein.

      E. ADJUSTMENT PROVISIONS IN THE EVENT OF AN EQUITY SPLIT OR REVERSE SPLIT.
If, prior to the expiration of this Warrant by exercise or by its terms, the
Company shall subdivide the number of outstanding shares of Common Stock into a
greater number of shares, then, in such case, the then applicable Exercise Price
in effect at the time of such action shall be proportionately reduced and the
number of Shares at that time purchasable pursuant to this Warrant shall be
proportionately increased; and, conversely, in the event that the Company shall
reduce the number of outstanding shares of Common Stock by combining such shares
into a smaller number of such shares of Common Stock, then, in such case, the
then applicable Exercise Price in effect at the time of such action shall be
proportionately increased and the number of Shares at the time purchasable
pursuant to this Warrant shall be proportionately decreased. No adjustment shall
be made for any distributions paid on outstanding shares of Common Stock whether
in cash or Common Stock. In addition, this provision is not intended to limit
the ability of the Company to issue additional shares of Common Stock to
employees of the Company for incentive purposes or to third parties or
affiliates for capital raising purposes. It is only intended to adjust the
number of Shares covered by the Warrant and the Exercise Price in the event of
an equity split or reverse split.

      F. OFFICER'S CERTIFICATE. Whenever the Exercise Price shall be adjusted as
required by the provisions of Section E hereof, or upon request of the Holder,
the Company shall forthwith file in the custody of its Secretary or an Assistant
Secretary at its principal office, and with its equity stock transfer agent, if
any, an officer's certificate showing the adjusted Exercise Price determined as
herein provided and setting forth in reasonable detail the facts requiring such
adjustment. Each such officer's certificate shall be made available at all
reasonable times for inspection by the Holder and the Company shall, forthwith
after each such adjustment, deliver a copy of such certificate to the Holder.
Such certificate shall be conclusive as to the correctness of such adjustment.

      G. NOTICE TO WARRANT HOLDER. So long as this Warrant shall be outstanding
and unexercised, if any capital reorganization of the Company, reclassification
of the capital equity of the Company, consolidation or merger of the Company
with or into another limited liability company, corporation or other entity;
sale, lease or transfer of all or substantially all of the property and assets
of the Company to another entity; or voluntary or involuntary dissolution,
liquidation or winding up of the Company shall be proposed, then, in such case,
the Company shall cause to be delivered to the Holder, at least ten days prior
to the date specified in (x) or (y) below, as the case may be, a notice
containing a brief description of the proposed action and

                                      -2-
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stating (x), the record date for the purpose of such distribution or rights, or
(y) the date such reclassification, reorganization, consolidation, merger,
conveyance, lease, dissolution, liquidation or winding up is to take place and
the date, if any, to be fixed, as of which the holders of shares of Common Stock
of record shall be entitled to exchange their shares of Common Stock for
securities or other property deliverable upon such reclassification,
reorganization, consolidation, merger, conveyance, dissolution, liquidation or
winding up.

      H. SIGNIFICANT CORPORATE CHANGE. In case the Company is to be merged or
consolidated with another limited liability company or other entity (other than
a wholly-owned subsidiary of the Company), and the Company is not to be the
surviving corporation, limited liability company or other entity, or in case
substantially all of the assets or Common Stock of the Company is acquired by
another person (other than a wholly-owned subsidiary of the Company), or in the
case of a separation, reorganization, dissolution or liquidation of the Company,
the Board of Directors of the Company, at their discretion, shall either (i)
upon written notice to the Holder, provide that this Warrant must be exercised
within a time specified within said notice, which time shall be a reasonable
time but shall not extend beyond the date which is immediately preceding the
date on which said merger, sale or other transaction is to be consummated, (ii)
make appropriate provisions for the protection of this Warrant by the
substitution on an equitable basis of appropriate shares of Common Stock of the
Company or of the merged, consolidated or otherwise reorganized corporation,
limited liability company or other entity which will be issuable with respect to
the Shares, provided only that the excess of the aggregate fair market value of
the substituted Shares subject to this Warrant immediately after such
substitution over the exercise price thereof is not more than the excess of the
aggregate fair-market value of the Shares subject to this Warrant immediately
before such substitution over the Exercise Price thereof, or (iii) provide the
Holder with an election to choose the provisions of clause (i) or clause (ii)
above, or any combination thereof. In the event of (i) above, the Board of
Directors may make reasonable arrangements, including a reasonable delay for the
time required for repayment of the Exercise Price, and for the implementation
of necessary or desirable requirements. This Warrant, notwithstanding the terms
and limitations on exercise contained herein, shall accelerate and become
exercisable in full prior to consummation of such dissolution, liquidation,
merger, consolidation, separation, reorganization or sale of assets or Common
Stock of the Company at such reasonable times as may be specified by the Board
of Directors.

      I. TRANSFER ABILITY OF WARRANT.

            (a) The Holder shall not sell, assign, transfer, pledge or otherwise
dispose of or encumber this Warrant, except to the extent, and upon compliance
with the conditions, set forth below;

                  (i) As an express condition precedent to its right to do so,
the Holder shall notify the Company in writing of its intention to sell, assign,
transfer, pledge or otherwise dispose of or encumber this Warrant and by such
notice shall offer (the "Offer") to sell this Warrant to the Company upon the
terms and conditions of a bona fide offer it has received from a third party.
Prior to the expiration of fifteen days following its receipt of such notice,
the Company may elect, at its option, to purchase this Warrant by so notifying
the Holder in writing.

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                  (ii) If the Company does not elect to purchase this Warrant,
the Holder shall be entitled to dispose of or encumber this Warrant. If the
Holder does not dispose of or encumber this Warrant within a period of three
months after the date of the offer to the Company, the Holder's right to dispose
of or encumber this Warrant pursuant to the terms and conditions of the Offer
shall cease and the Holder shall again hold this Warrant subject to all of the
terms and conditions of this Warrant, including this Section I.

            (b) Subject to the provisions of paragraph (a) above, this Warrant
may be sold, transferred or otherwise disposed of only to a person, which, in
the opinion of counsel for the Company, is a person to whom this Warrant may
legally be transferred without registration and without the delivery of a
current prospectus under the Securities Act of 1933, as amended (the "Act"),
with respect thereto and then only against receipt of any agreement of such
person to comply with the terms and provisions of this Section I with respect to
any resale or other disposition of such securities.

            (c) Subject to the provisions of paragraph (a) above, any Shares
issued or issuable pursuant to exercise of this Warrant may be sold, transferred
or otherwise disposed of only to a person who, in the opinion of counsel for the
Company, is a person to whom such Shares may legally be transferred without
registration and without the delivery of a current prospectus under the Act with
respect thereto and then only against receipt of any agreement of such person to
comply with the terms and provisions of Section I with respect to any resale or
other disposition of such securities.

            (d) The Company will cause the following legend to be set forth on
each certificate representing the Shares or any other security issued or
issuable upon exercise of this Warrant not theretofore registered for
distribution to the public unless counsel for the Company is of the opinion as
to any such certificate that such legend is unnecessary.

      "THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
      UNDER THE SECURITIES ACT OF 1933 NOR REGISTERED NOR QUALIFIED UNDER ANY
      STATE SECURITIES LAWS. SUCH SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD,
      DELIVERED FOR SALE, TRANSFERRED, PLEDGED. OR HYPOTHECATED UNLESS QUALIFIED
      AND REGISTERED UNDER APPLICABLE STATE AND FEDERAL SECURITIES LAWS OR
      UNLESS, IN THE OPINION OF COUNSEL SATISFACTORY TO THE COMPANY, SUCH
      QUALIFICATION AND REGISTRATION IS NOT REQUIRED."

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      J. APPLICABLE LAW. This Warrant shall be governed by, and construed in
accordance with, the laws of the State of Utah.

      K. TERM AND EXPIRATION. This Warrant will expire and become void to the
extent not exercised and paid for by the Expiration date shown on the first
page hereof.

      DATED this 1st day of January 2003.

                                                    CYBERKINETICS, INC.

                                                    By: /s/ Tim Surgenor
                                                        ---------------------
                                                        Name: Tim Surgenor
                                                        Title: President

Accepted and agreed:

UNIVERSITY OF UTAH RESEARCH FOUNDATION

By:
    -------------------------------
    Name:
    Title:<PAGE>

                                                                     EXHIBIT 4.5

           THE SECURITIES REPRESENTED BY THIS WARRANT HAVE BEEN ACQUIRED FOR
           INVESTMENT, HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
           1933, AS AMENDED (THE "ACT"), OR UNDER ANY STATE SECURITIES LAWS,
           AND MAY NOT BE SOLD, TRANSFERRED, OR ASSIGNED EXCEPT: (i) PURSUANT
           TO AN EFFECTIVE REGISTRATION THEREOF UNDER THE ACT AND APPLICABLE
           STATE LAW OR (ii) IF THE PROPOSED SALE, TRANSFER OR ASSIGNMENT MAY
           BE EFFECTED WITHOUT SUCH REGISTRATION AND WILL NOT BE IN VIOLATION
           OF APPLICABLE SECURITIES LAWS, AND THE COMPANY RECEIVES AN OPINION
           OF COUNSEL REASONABLY SATISFACTORY TO THE COMPANY THAT REGISTRATION
           OR QUALIFICATION UNDER SUCH APPLICABLE SECURITIES LAWS IS NOT
           REQUIRED.

WARRANT 1 (48,430 SHARES COMMON STOCK)                           AUGUST 13, 2002

                        COMMON STOCK PURCHASE WARRANT OF
                               CYBERKINETICS, INC.

SECTION 1. WARRANT RIGHT; VESTING.

      1.1 Cyberkinetics, Inc., a Delaware corporation (the "Company"), hereby
certifies that, for value received, Brown University Research Foundation (the
"Holder"), or its successors and permitted assigns, is entitled, subject to the
terms set forth below, to purchase from the Company, at any time or from time to
time before 5:00 p.m., Providence, Rhode Island time, on August 13, 2007, (the
"Expiration Date"): 48,430 fully paid and non-assessable shares of Common Stock,
par value $0.0001 (the "Warrant Number"). at a purchase price per share of
US$0.10 (the "Purchase Price"). This Warrant has been issued to the Holder
pursuant to Section 2.3(a) of a certain License Agreement, dated as of August
13, 2002, among the Company, the Holder, and Massachusetts Institute of
Technology (the "License Agreement").

      1.2 For the purpose of this Warrant, a "Vesting Event" means the
occurrence of the following; (i) the Company exercises the Option under Section
2.3 of the License Agreement to acquire an exclusive license to an Additional
Invention and (ii) such additional invention is licensed to the Company in
accordance with Section 2.3 of the License Agreement. This Warrant will vest
with respect to (1) 12,108 shares upon the first Vesting Event; (ii) 12,108
shares upon the second Vesting Event; (iii) 12,108 shares upon the third Vesting
Event; and (iv) 12,106 shares upon the fourth Vesting Event Shares vested under
this Section 1.2 shall remain vested until the Expiration Date.

SECTION 2. EXERCISE: NET ISSUANCE PROVISION.

      2.1 EXERCISE. This Warrant may be exercised in full or in part at any time
or from time to time until the Expiration Date by the Holder to the extent it is
vested (as set forth in Section 1.2, above), hereof by surrender of this Warrant
and the subscription form annexed hereto (duly executed by the Holder) to the
Company at its principal office, accompanied by payment, in cash or by certified
or bank check payable to the order of the Company in the amount obtained by
multiplying (a) the number of shares of Common Stock designated to be

                                             Warrant to Purchase Common Stock- 1

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purchased by the Holder in that subscription form by (b) the Purchase Price. On
any partial exercise of this Warrant, the Company, at its expense, will
forthwith issue and deliver to the Holder hereof a new Warrant of like tenor,
providing in the aggregate on the face thereof for the number of shares of
Common Stock for which such Warrant may still be exercised.

      2.2 NET ISSUANCE.

            (a) The Holder shall also have the right (the "Conversion Right") to
      cause the Company to convert this Warrant, in whole or in part, at any
      time prior to the Expiration Date, into shares of Common Stock as provided
      for in this Section 2.2 (to the extent that this Warrant is vested as set
      forth in Section 1.2, above). Upon exercise of the Conversion Right, the
      Company shall deliver to the Holder (without payment by the Holder of any
      Purchase Price) that number of shares of Common Stock equal to the
      quotient obtained by dividing (x) the value of the Warrant at the time the
      Conversion Right is exercised (determined by subtracting the aggregate
      Purchase Price for the shares of Common Stock then issuable upon exercise
      of this Warrant (the "Warrant Shares") in effect immediately prior to the
      exercise of the Conversion Right from the aggregate fair market value for
      the Warrant Shares immediately prior to the exercise of the Conversion
      Right) by (y) the Purchase Price.

            (b) The Conversion Right may be exercised by the Holder, at any
      time, or from time to time, prior to the Expiration Date, on any business
      day by surrender of this Warrant and delivery of a written notice in the
      form annexed hereto (duly executed by the Holder) (the "Conversion
      Notice") to the Company exercising the Conversion Right and specifying (i)
      the total number of shares of Common Stock the Holder will purchase
      pursuant to such conversion and (ii) a place and date not more than twenty
      business days from the date of the Conversion Notice for the closing of
      such purchase.

            (c) At any closing under this Section 2.2, (i) the Holder will
      surrender the Warrant, and (ii) the Company will deliver to the Holder a
      certificate for the number of shares of Common Stock issuable upon such
      conversion, together with cash, in lieu of any fraction of a share, as
      provided in Section 3 below.

SECTION 3. DELIVERY OF STOCK CERTIFICATES, ETC., ON EXERCISE. As soon as
practicable after the exercise conversion of this Warrant, and in any event
within twenty days thereafter, the Company, at its expense (including the
payment by it of any applicable issue or stamp taxes), will cause to be issued
in the name of and delivered to the Holder hereof a certificate or certificates
for the number of fully paid and non-assessable shares of Common Stock to which
such Holder shall be entitled on such exercise, in such denominations as may be
requested by such Holder, plus, in lieu of any fractional share to which such
Holder would otherwise be entitled, cash equal to such fraction multiplied by
the then current fair market value (as determined in good faith by the Board of
Directors of the Company) of one full share, together with any other stock or
other securities and property (including cash, where applicable) to which such
Holder is entitled upon such exercise or conversion pursuant to Section 2.

SECTION 4. ADJUSTMENT FOR DIVIDENDS IN OTHER STOCK, PROPERTY; RECLASSIFICATION,
ETC. In case, at any time, or from time to time, the Holders of Common Stock
shall have received, or (on or after the record date fixed for the determination
of shareholders eligible to receive shall have become entitled to receive),
without payment therefor, (i) other or additional stock or other securities or
property (other than cash) by way of dividend, (ii) any cash (excluding cash
dividends payable out of earnings or earned surplus of the Company), or (iii)
other or additional stock or other securities or property (including cash) by
way of spin-off, split-up, reclassification,

                                             Warrant to Purchase Common Stock- 2

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recapitalization, combination of shares of similar corporate rearrangement,
other than additional shares of Common Stock issued as a stock dividend or in a
stock-split (adjustments in respect of which are provided for in Section 6),
then and in each such case the Holder of this Warrant, on the exercise or
conversion hereof as provided in Section 2, shall be entitled to receive the
amount of stock and property (including cash in the cases referred to in
subdivisions (ii) and (iii) of this Section 4) which such Holder would hold on
the date of such exercise if on the date hereof he had been the Holder of record
of the number of shares of Common Stock called by this Warrant (adjusted to the
shares actually issued to the Holder upon exercise of the Conversion Right) and
had thereafter, during the period from the date hereof to and including the date
of such exercise, retained such shares and all such other or additional stock
and other securities and property receivable by him as aforesaid during such
period, giving effect to all adjustments called for during such period by
Section 5 and Section 6 hereof.

SECTION 5. ADJUSTMENT FOR REORGANIZATION, CONSOLIDATION, MERGER, ETC.

      5.1 GENERAL. In case, at any time or from time to time, the Company shall
(i) effect a reorganization, (ii) consolidate with or merge into any other
person in which the Company is not the surviving entity, or (iii) transfer all
or substantially all of its properties or assets to any other person under any
plan or arrangement contemplating the dissolution of the Company, then, in each
such case, the Holder of this Warrant, on the exercise or conversion hereof as
provided in Section 2 at any time within ten business days after the
consummation of such reorganization, consolidation or merger or the effective
date of such dissolution, as the case may be, shall receive, in lieu of the
Common Stock issuable on such exercise prior hereof to such consummation or such
effective date, the stock and other securities and property (including cash) to
which such Holder would have been entitled upon such consummation or in
connection with such dissolution, as the case may be, if such Holder had so
exercised or converted this Warrant immediately prior to such reorganization,
consolidation, merger or transfer of all or substantially all of the Company's
property or assets.

      5.2 CONTINUATION OF TERMS. Upon any reorganization, consolidation, merger
or transfer (and any dissolution following any transfer) referred to in Section
5.1, and in the event that this Warrant is not exercised in accordance with the
provisions of Section 5.1, then this Warrant shall continue in full force and
effect and the terms hereof shall be applicable to the shares of stock and other
securities and property receivable on the exercise of this Warrant after the
consummation of such reorganization, consolidation or merger or the effective
date of dissolution following any such transfer, as the case may be, and shall
be binding upon the issuer of any such stock or other securities, including, in
the case of any such transfer, the person acquiring all or substantially all of
the properties or assets of the Company, whether or not such person shall have
expressly assumed the terms of this Warrant.

SECTION 6. ADJUSTMENT FOR EXTRAORDINARY EVENTS. In the event that the Company
shall (i) issue additional shares of Common Stock as a dividend or other
distribution on outstanding Common Stock, (ii) subdivide or reclassify its
outstanding shares of Common Stock, or (iii) combine its outstanding shares of
Common Stock into a smaller number of shares of Common Stock ("Additional
Shares"), then, in each such event, the Warrant Number shall, simultaneously
with the happening of such event, be adjusted to reflect such event to allow the
Holder hereof to exercise or convert this Warrant with respect to such
Additional Shares.

SECTION 7. NO IMPAIRMENT. The Company will not, by amendment of its Amended or
Restated Certificate of Incorporation or through any reorganization, transfer of
assets, consolidation, merger, dissolution, or any other similar voluntary
action, avoid or seek to avoid the observance or performance of any the terms of
this Warrant, but will at all times in good faith

                                             Warrant to Purchase Common Stock- 3

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assist in the carrying out of all such terms and in the taking of all such
action as may be necessary or appropriate in order to protect the rights of the
Holder of the Warrant against impairment due to such event. Without limiting the
generality of the foregoing, the Company (a) will not increase the par value of
any shares of stock receivable on the exercise of the Warrant above the amount
payable therefore on such exercise, (b) will take all action that may be
necessary or appropriate in order that the Company may validly and legally issue
fully paid and non-assessable shares of stock, free from all taxes, liens and
charges with respect to the issue thereof, on the exercise of all of the
Warrants from time to time outstanding, and (c) will not consolidate with or
merge into any other person or permit any such person to consolidate with or
merge into the Company (if the Company is not the surviving person), unless such
other person shall, pursuant to Section 5 hereof, expressly assume in writing
and will be bound by all the terms of this Warrant

SECTION 8. NOTICES OF RECORD DATE, ETC. In the event of

            (a) any taking by the Company of a record of the Holders of any
      class of securities for the purpose of determining the Holders thereof who
      are entitled to receive any dividend on, or any right to subscribe for,
      purchase or otherwise acquire any shares of stock of any class or any
      other securities or property, or to receive any other right, or

            (b) any capital reorganization of the Company, any reclassification
      or recapitalization of the capital stock of the Company or any transfer of
      all or substantially all the assets of the Company to or consolidation or
      merger of the Company with or into any other person, or

            (c) any voluntary or involuntary dissolution, liquidation or
      winding-up of the Company,

then and in each such event the Company will, at least ten calendar days before
such event, mail or cause to be mailed to the registered Holder of this Warrant
a notice specifying (i) the date on which any such record is to be taken for the
purpose of such dividend, distribution or right, and stating the amount and
character of such dividend, distribution or right, (ii) the date on which any
such reorganization, reclassification, recapitalization, transfer,
consolidation, merger, dissolution, liquidation or winding-up is to take place,
and the time, if any is to be fixed, as of which the Holders of record of Common
Stock shall be entitled to exchange their shares of Common Stock for securities
of other property deliverable on such reorganization, reclassification.
recapitalization, transfer, consolidation, merger, dissolution, liquidation or
winding-up, and (iii) the amount and character of any, stock or other
securities, or rights or options with respect thereto, proposed to be issued or
granted, the date of such proposed issue or grant and the persons or class of
persons to whom such proposed issue or grant is to be offered or made.

SECTION 9. RESERVATION OF STOCK, ETC., ISSUABLE ON EXERCISE OF WARRANTS. The
Company will at all times reserve and keep available, solely for issuance and
delivery on the exercise of the Warrant, all shares of Common Stock from time to
time issuable on the exercise of the Warrant.

SECTION 10. TRANSFER OF WARRANT. THE SECURITIES REPRESENTED BY THIS WARRANT HAVE
BEEN ACQUIRED FOR INVESTMENT, HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT
OF 1933, AS AMENDED (THE "ACT"), OR UNDER ANY STATE SECURITIES LAWS, AND MAY NOT
BE SOLD, TRANSFERRED, OR ASSIGNED EXCEPT: (i) PURSUANT TO AN EFFECTIVE
REGISTRATION THEREOF UNDER THE ACT AND APPLICABLE STATE LAW OR (ii) IF THE
PROPOSED SALE, TRANSFER OR ASSIGNMENT

                                             Warrant to Purchase Common Stock- 4

<PAGE>

MAY BE EFFECTED WITHOUT SUCH REGISTRATION AND WILL NOT BE IN VIOLATION OF
APPLICABLE SECURITIES LAWS, AND THE COMPANY RECEIVES AN OPINION OF COUNSEL
REASONABLY SATISFACTORY TO THE COMPANY THAT REGISTRATION OR QUALIFICATION UNDER
SUCH APPLICABLE SECURITIES LAWS IS NOT REQUIRED.

SECTION 11. LOCK-UP; REGISTER OF WARRANTS.

      11.1 The holder of this Warrant agrees not to sell or otherwise transfer
any shares of Common Stock issued or issuable upon exercise of this Warrant for
a period of up to 180 days following the closing of the Company's initial public
offering, provided the underwriters of the offering have requested that
directors, executive officers and other stockholders of the Company agree not to
sell or transfer shares of Common Stock during such period.

      11.2 The Company shall maintain, at the principal office of the Company
(or such other office as it may designate by notice to the Holder hereof), a
register for the Warrant, in which the Company shall record the name and address
of the person in whose name this Warrant has been issued, as well as the name
and address of each transferee and each prior owner of this Warrant.

SECTION 12. REPLACEMENT OF WARRANTS. On receipt of evidence reasonably
satisfactory to the Company of the loss, theft, destruction or utilization of
this Warrant and, in the case of any such loss, theft or distribution of this
Warrant, on delivery of an indemnity agreement or security reasonably
satisfactory in form and amount to the Company or, in the case of any such
mutilation, on surrender and cancellation of such Warrant, the Company, at its
expense, will execute and deliver, in lieu thereof, a new Warrant of like tenor.

SECTION 13. REMEDIES. The Company stipulates that the remedies at law of the
Holder of this Warrant in the event of any default or threatened default by the
Company in the performance of or compliance with any of the terms of this
Warrant are not and will not be adequate, and that such terms may be
specifically enforced by a decree for the specific performance of any agreement
contained herein or by an injunction against a violation of any of the terms
hereof or otherwise.

SECTION 14. CLOSING OF BOOKS. The Company will at no time close its transfer
books against the transfer or any warrant or of any shares of Common Stock
issued or issuable upon the exercise or conversion of this Warrant in any manner
which interferes with the timely exercise of this Warrant.

SECTION 15. NO RIGHTS OR LIABILITIES AS A STOCKHOLDER. This Warrant shall not
entitle the Holder hereof to any voting rights or other rights as a stockholder
of the Company; provided that nothing herein shall be construed to affect any
rights a Holder hereof may have under the Agreement. No provision of this
Warrant and no mere enumeration herein of the rights or privileges of the Holder
hereof shall give rise to any liability of such Holder for the Purchase Price or
as a stockholder of the Company, whether such liability is asserted by the
Company or by creditors of the Company.

SECTION 16. NOTICES, ETC. All notices and other communications from the Company
to the registered Holder of this Warrant shall be mailed by first class
registered or certified mail, postage prepaid, at such address as may have been
furnished to the Company in writing by such Holder or at the address shown on
such Holder's Warrant.

SECTION 17. FAIR MARKET VALUE. For the purposes of this Agreement, the fair
market value of shares of Common Stock shall be determined in good faith by the
Board of Directors of

                                             Warrant to Purchase Common Stock- 5

<PAGE>

Cyberkinetics, with regard to comparable sales of and other transactions
relating to the Company's securities.

SECTION 18. MISCELLANEOUS. This Warrant and any term hereof may be changed,
waived, discharged or terminated only by an instrument in writing signed by the
party against which enforcement of such change, waiver, discharge or termination
is sought. This Warrant shall be construed and enforced in accordance with and
governed by the general corporate laws of the State of Delaware. The headings in
this Warrant are for purposes of reference only, and shall not limit or
otherwise affect any of the terms hereof. This Warrant is the entire agreement
of the parties with respect to its subject matter. The invalidity or
unenforceability of any provision hereof shall in no way affect the validity or
enforceability of any other provision.

Executed under seal as of the date first written above.

                                          CYBERKINETICS, INC.

                                          /s/ Tim Surgenor
                                          --------------------------------------
                                          Tim Surgenor
                                          President and Chief Executive Officer

Accepted and Agreed:

BROWN UNIVERSITY RESEARCH FOUNDATION

                                             Warrant to Purchase Common Stock- 6

<PAGE>

                              FORM OF SUBSCRIPTION
       (To be signed only on exercise of Warrant pursuant to Section 2.1)

                               CYBERKINETICS, INC.

      The undersigned, the Holder of the Warrant attached hereto, hereby
irrevocably elects to exercise this Warrant pursuant to Section 2.1 thereof for,
and to purchase thereunder,________ shares of Common Stock of Cyberkinetics,
Inc. and herewith makes payment of $_________ in cash.

Dated: ___________

                                        _________________________________
                                        (Signature)

                                        _________________________________
                                        (Name)

                                        _________________________________
                                        (Address)

<PAGE>

                               FORM OF CONVERSION
     (To be signed only upon conversion of Warrant pursuant to Section 2.2)

                               CYBERKINETICS, INC.

      The undersigned, the Holder of the Warrant attached hereto, hereby
irrevocably elects to convert this warrant pursuant to Section 2.2 thereof, into
shares of Common Stock of Cyberkinetics, Inc.

Dated:____________

                                        _________________________________
                                        (Signature)

                                        _________________________________
                                        (Name)

                                        _________________________________
                                        (Address)

                                             Warrant to Purchase Common Stock- 8

<PAGE>

                               FORM OF ASSIGNMENT
                   (To be signed only on transfer of Warrant)

      For value received, the undersigned hereby sells, assigns, and transfers
unto ________________the right represented by the within Warrant to purchase
_______ shares of Common Stock of Cyberkinetics, Inc. to which the within
Warrant relates, and appoints______________________attorney to transfer such
right on the books of Cyberkinetics, Inc. with full power of substitution in the
premises.

Dated:____________________

                                        _________________________________
                                        (Signature)

                                        _________________________________
                                        (Name)

                                        _________________________________
                                        (Address)

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