The De La Rue Company PLC

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4752965 Sign verificationExpiredJun 15, 87Jun 21, 88[G06K]
4751525 Scanning system and method of scanningExpiredMay 06, 86Jun 14, 88[H04N, G01D]
4747620 Security card and security card blankExpiredAug 13, 86May 31, 88[B42D]
4707573 Electrical conductor arrayExpiredOct 23, 86Nov 17, 87[G08C]
4680801 Sign verificationExpiredAug 30, 85Jul 14, 87[G06K]
4629874 Prepayment metering systemExpiredDec 26, 84Dec 16, 86[G06K]

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