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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 jH8kYvufGIhEVCV/qVotkw==

<SEC-DOCUMENT>0000070415-04-000028.txt : 20041110
<SEC-HEADER>0000070415-04-000028.hdr.sgml : 20041110
<ACCEPTANCE-DATETIME>20041109161934
ACCESSION NUMBER:		0000070415-04-000028
CONFORMED SUBMISSION TYPE:	3/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20041109
FILED AS OF DATE:		20041109
DATE AS OF CHANGE:		20041109

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NATIONAL PATENT DEVELOPMENT CORP
		CENTRAL INDEX KEY:			0001279715
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS MANUFACTURING INDUSTRIES [3990]
		IRS NUMBER:				134005439
		STATE OF INCORPORATION:			DE

	BUSINESS ADDRESS:	
		STREET 1:		777 WESTCHESTER AVE.
		STREET 2:		FOURTH FLOOR
		CITY:			WHITE PLAINS
		STATE:			NY
		ZIP:			10640

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GP STRATEGIES CORP
		CENTRAL INDEX KEY:			0000070415
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-EDUCATIONAL SERVICES [8200]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50587
		FILM NUMBER:		041129901

	BUSINESS ADDRESS:	
		STREET 1:		777 WESTCHESTER AVENUE
		STREET 2:		FOURTH FLOOR
		CITY:			WHITE PLAINS
		STATE:			NY
		ZIP:			10604
		BUSINESS PHONE:		914-249-9700

	MAIL ADDRESS:	
		STREET 1:		777 WESTCHESTER AVENUE
		STREET 2:		FOURTH FLOOR
		CITY:			WHITE PLAINS
		STATE:			NY
		ZIP:			10604

	FORMER NAME:	
		FORMER CONFORMED NAME:	NATIONAL PATENT DEVELOPMENT CORP
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>3/A
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2004-11-09</periodOfReport>

    <dateOfOriginalSubmission>2004-11-09</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001279715</issuerCik>
        <issuerName>NATIONAL PATENT DEVELOPMENT CORP</issuerName>
        <issuerTradingSymbol>NPDVV</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000070415</rptOwnerCik>
            <rptOwnerName>GP STRATEGIES CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>777 WESTCHESTER AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>FOURTH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>WHITE PLAINS</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10604</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>17769919</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Lydia M. DeSantis, Corporate Secretary</signatureName>
        <signatureDate>2004-11-09</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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