-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 NIYVjOS0g/xFFiLmO4TXzn06xkzcbvD9U3u8AQr1WdbgqIKry+YiXed12fGVIXJm
 QhXsqETi6MdGhwYtcQcDlw==

<SEC-DOCUMENT>0001193663-03-000004.txt : 20030611
<SEC-HEADER>0001193663-03-000004.hdr.sgml : 20030611
<ACCEPTANCE-DATETIME>20030611132102
ACCESSION NUMBER:		0001193663-03-000004
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030610
FILED AS OF DATE:		20030611

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PHELPS JAMES R
		CENTRAL INDEX KEY:			0001193649

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-11647
		FILM NUMBER:		03740212

	BUSINESS ADDRESS:	
		STREET 1:		7272 CHAPMAN AVENUE
		CITY:			GARDEN GROVE
		STATE:			CA
		ZIP:			92841

	MAIL ADDRESS:	
		STREET 1:		7272 CHAPMAN AVENUE
		CITY:			GARDEN GROVE
		STATE:			CA
		ZIP:			92841

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HYCOR BIOMEDICAL INC /DE/
		CENTRAL INDEX KEY:			0000719447
		STANDARD INDUSTRIAL CLASSIFICATION:	IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
		IRS NUMBER:				581437178
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		7272 CHAPMAN AVE
		CITY:			GARDEN GROVE
		STATE:			CA
		ZIP:			92841
		BUSINESS PHONE:		7149333000

	MAIL ADDRESS:	
		STREET 2:		7272 CHAPMAN AVENUE
		CITY:			GARDEN GROVE
		STATE:			CA
		ZIP:			92841

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	HYBRIDOMA SCIENCES INC
		DATE OF NAME CHANGE:	19860813
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-06-10</periodOfReport>
    <issuer>
        <issuerCik>0000719447</issuerCik>
        <issuerName>HYCOR BIOMEDICAL INC /DE/</issuerName>
        <issuerTradingSymbol>HYBD</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId>
            <rptOwnerCik>0001193649</rptOwnerCik>
            <rptOwnerName>PHELPS JAMES R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeSecurity><securityTitle><value>NQSOP</value><footnoteId id="F1"/></securityTitle><conversionOrExercisePrice><value>4.26</value></conversionOrExercisePrice><transactionDate><value>2003-06-10</value></transactionDate><transactionCoding><transactionFormType>5</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>2000</value></transactionShares><transactionValue><value>4.26</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-06-09</value></exerciseDate><expirationDate><value>2013-06-09</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value
>2000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>2000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><derivativeSecurity><securityTitle><value>NQSOP</value><footnoteId id="F1"/></securityTitle><conversionOrExercisePrice><value>4.26</value></conversionOrExercisePrice><transactionDate><value>2003-06-10</value></transactionDate><transactionCoding><transactionFormType>5</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>2000</value></transactionShares><transactionValue><value>4.26</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>
2005-06-09</value></exerciseDate><expirationDate><value>2013-06-09</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>2000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>4000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><derivativeSecurity><securityTitle><value>NQSOP</value><footnoteId id="F1"/></securityTitle><conversionOrExercisePrice><value>4.26</value></conversionOrExercisePrice><transactionDate><value>2003-06-10</value></transactionDate><transactionCoding><transactionFormType>5</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares
><value>2000</value></transactionShares><transactionValue><value>4.26</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2006-06-09</value></exerciseDate><expirationDate><value>2013-06-09</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>2000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>6000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><footnotes><footnote id="F1">These options were granted under the Company's Nonqualified Stock Option Plan for NonEmployee Directors</footnote></footnotes><ownerSignature><signatureName>Reg Jones, Attorne
y-in-Fact, On Behalf of James R. Phelps</signatureName><signatureDate>2003-06-11</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----