FORM 4
                 UNITED STATES SECURITIES AND EXCHANGE COMMISSION

                              Washington, D.C. 20549

                  STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

| |     Check this box if no longer subject
        to Section 16.  Form 4 or Form 5
        obligations may continue.  See
        Instruction 1(b).


        Filed pursuant to Section 16(a) of the Securities Exchange Act of
        1934, Section 17(a) of the Public Utility Holding Company Act
        of 1935 or Section 30(h) of the Investment Company Act of 1940



                                                                        
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1. Name and Address of Reporting Person*/ 2. Issuer Name and Ticker or Trading    / 6. Relationship of Reporting Person(s) to Issuer
                                        /    Symbol                               /              (Check all applicable)
                                        /                                         /
                                        /                                         /     X   Director            ___  10% Owner
                                        /    ThermoGenesis Corp. ("KOOL")         /    ___  Officer             ___  Other
                                        /                                         /         (give title below)       (specify below)
                                        /                                         /
Barry,        George                    /                                         /
----------------------------------------/---------------------------------------- /-------------------------------------------------
(Last)        (First)       (Middle)    / 3. IRS Identification/ 4. Statement for / 7. Individual or Joint/Group Filing
                                        /    Number of         / (Month/Day/Year) /    (Check Applicable Line)
c/o ThermoGenesis Corp.                 /    Reporting Person, /                  /
3146 Gold Camp Drive                    /    if an entity      /     8/2/02       /     X  Form filed by One Reporting Person
----------------------------------------/    (Voluntary)       /------------------/
(Street)                                /                      / 5. If Amendment, /    ___ Form filed by More than One Reporting
                                        /                      / Date of Original /        Person
                                        /                      / (Month/Day/Year) /
Rancho Cordova,        CA      95670    /                      /                  /
--------------------------------------- /                      /                  /
(City)                (State)  (Zip)    /                      /                  /
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                           TABLE I - NONDERIVATIVE SECURITIES ACQUIRED, DISPOSED OF, OR BENEFICIALLY OWNED
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1. Title     /2.Trans-   /2A. Deemed   /3.Transaction/4. Securities Acquired (A) or     /5. Amount of /6. Ownership / 7. Nature of
   of        /  action   /    Execution/  Code       /   Disposed of (D) (Instr. 3,     / Securities  /   Form:     /    Indirect
  Security   /  Date     /    Date, if /  Instr. 8)  /   4 and 5)                       / Beneficially/   Direct (D)/    Beneficial
  (Inst.3)   /(Mo/Day/Yr)/    any      /             /                                  / Owned       /   or        /    Ownership
             /           / (Mo/Day/Yr) /------------------------------------------------/ Following   /   Indirect  /
             /           /             / Code /  V   /   Amount   /(A) or (D)/  Price   / Reported    /   (I)       /    (Instr. 4)
             /           /             /      /      /            /          /          / Trans-      /             /
             /           /             /      /      /            /          /          / action(s)   /   (Instr.4) /
             /           /             /      /      /            /          /          /(Inst. 3 & 4)/             /
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2


FORM 4 (continued)




                                                                                         
                           TABLE II - DERIVATIVE SECURITIES ACQUIRED, DISPOSED OF, OR BENEFICIALLY OWNED
                                      (e.g., puts, calls, warrants, options, convertible securities)
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1.          / 2.      /3.      /3A. Deemed/4.Trans-/5. Number of/6. Date         /7. Title and   /8.      /9.      /10.     /11.
Title of    / Con-    /  Trans-/ Execution/ action / Derivative / Exercisable    /   Amount of   / Price  / Number / Owner- /Nature
Derivative  / version / action / Date, if / Code   / Securities / and Expiration /   Underlying  /   of   /   of   / ship   /of
Security    /   or    / Date   / any      /        / Acquired   / Date           /   Securities  / Deriv- / Deriv- / Form of/In-
(Instr. 3)  / Exercise/ (Month// (Month/  /(Inst.8)/ (A) or     /                /               / ative  / ative  / Deriv- /direct
            / Price of/  Day/  /  Day/    /        / Disposed of/(Month/Day/Year)/(Instr. 3 & 4) / Secu-  / Secu-  / ative  /Bene-
            /   of    /  Year) /  Year)   /        / (D)        /                /               / rity   / rities / Secu-  /ficial
            / Deriv-  /        /          /        /            /                /               /        / Benefi-/ rities /Owner-
            / ative   /        /          /        /(Inst.3,4,5)/                /               /(Inst.4)/ cially / Benefi-/ship
            / Secu-   /        /          /--------/------------/----------------/---------------/        / Owned  / cially /
            / rity    /        /          /Code/ V / (A) / (D)  / Date   / Expir-/ Title /Amount /        /Follow- / Owned  /(Inst.
            /         /        /          /    /   /     /      / Exer-  / ation /       / or    /        /ing     /        / 4)
            /         /        /          /    /   /     /      / cisable/ Date  /       /No. of /        /Reported/(Inst.4)/
            /         /        /          /    /   /     /      /        /       /       /Shares /        /Trans-  /        /
            /         /        /          /    /   /     /      /        /       /       /       /        /actions /        /
            /         /        /          /    /   /     /      /        /       /       /       /        /(Inst.4)/        /
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Options to    $1.81    8/2/02       -       A    V  25,000       8/2/02   8/2/07  Common  25,000      -    65,000      D       N/A
Purchase                                                                          Stock
Common
Stock
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Explanation of Responses:



                                                                                   /S/ GEORGE BARRY                     9/10/02
                                                                                   --------------------------------     ----------
                                                                                   George Barry                         Date




Reminder: Report on a separate line for each class of securities beneficially
          owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction
  4(b)(v).

**Intentional  misstatements or omissions of facts  constitute  Federal Criminal
Violations.  See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note:  File three copies of this Form, one of which must be manually signed.
       If space provided is insufficient, see Instruction 6 for procedure.