Exhibit 31.3

                            CERTIFICATION PURSUANT TO
                  SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I,   Robert F. Hartman, certify that:

     1.   I have reviewed this quarterly report on Form 10-QSB of CERBCO, Inc.;

     2.   Based on my  knowledge,  this  report  does  not  contain  any  untrue
          statement  of a  material  fact  or  omit to  state  a  material  fact
          necessary to make the statements  made, in light of the  circumstances
          under which such  statements were made, not misleading with respect to
          the period covered by this report;

     3.   Based on my knowledge,  the financial statements,  and other financial
          information  included in this report,  fairly  present in all material
          respects the financial condition, results of operations and cash flows
          of the small business issuer as of, and for, the periods  presented in
          this report;

     4.   The  small  business  issuer's  other  certifying  officers  and I are
          responsible for establishing and maintaining  disclosure  controls and
          procedures [as defined in Exchange Act Rules  13a-15(e) and 15d-15(e)]
          for the small business issuer and have:

          a)   Designed such disclosure controls and procedures,  or caused such
               disclosure  controls  and  procedures  to be  designed  under our
               supervision,  to ensure that material information relating to the
               small business issuer,  including its consolidated  subsidiaries,
               is made known to us by others within those entities, particularly
               during the period in which this report is being prepared;

          b)   [Intentionally omitted]

          c)   Evaluated  the  effectiveness  of  the  small  business  issuer's
               disclosure  controls and  procedures and presented in this report
               our  conclusions   about  the  effectiveness  of  the  disclosure
               controls and  procedures,  as of the end of the period covered by
               this report based on such evaluation; and

          d)   Disclosed  in  this  report  any  change  in the  small  business
               issuer's internal control over financial  reporting that occurred
               during the small  business  issuer's most recent  fiscal  quarter
               (the small business issuer's fourth fiscal quarter in the case of
               an annual report) that has materially affected,  or is reasonably
               likely to materially affect, the small business issuer's internal
               control over financial reporting; and

5.   The small business issuer's other certifying officers and I have disclosed,
     based  on our  most  recent  evaluation,  to the  small  business  issuer's
     auditors  and the  audit  committee  of small  business  issuer's  board of
     directors (or persons performing the equivalent functions):

     a)   All significant  deficiencies and material weaknesses in the design or
          operation  of internal  control  over  financial  reporting  which are
          reasonably  likely to  adversely  affect the small  business  issuer's
          ability   to  record,   process,   summarize   and  report   financial
          information; and

     b)   Any fraud, whether or not material,  that involves management or other
          employees who have a significant  role in the small business  issuer's
          internal control over financial reporting.

February 17, 2004
                                       /s/Robert F. Hartman
                                       -----------------------------------------
                                       Robert F. Hartman
                                       Vice President, Secretary & Treasurer