**Exhibit
            31.2**
 
 **CERTIFICATIONS**
 
 I,
            Scott
            N. Greenberg, certify that:
 
 1.
                I
                    have reviewed this quarterly report on Form 10-Q of National
                    Patent
                    Development Corporation; 
 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
                    registrant as of, and for, the periods presented in this report; 
 4.
                The
                    registrant’s other certifying officer(s) 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
                    registrant
                    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 registrant, 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)  Evaluated
            the effectiveness of the registrant’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
 
 (c)  Disclosed
            in this report any change in the registrant’s internal control over financial
            reporting that occurred during the registrant’s most recent fiscal quarter (the
            registrant’s fourth fiscal quarter in the case of an annual report) that has
            materially affected, or is reasonably likely to materially affect, the
            registrant’s internal control over financial reporting; and **
 
 5.
                The
                    registrant’s other certifying officer(s) and I have disclosed, based on
                    our most recent evaluation of internal control over financial
                    reporting,
                    to the registrant’s auditors and the audit committee of the registrant’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 registrant’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 registrant’s internal control over financial
            reporting.
 
 
 Date:
            May
            15, 2007
 
 /s/
            SCOTT N. GREENBERG
 Name:
            Scott N. Greenberg
 Title:
            Chief Financial Officer