Assignee
LIGHT SIGNATURES INC
US·28 granted patents·2,317 citations·filing 1981–1988
Top patents by PatentIndex Score
28 records- 0199US4423415ANon-counterfeitable document systemLIGHT SIGNATURES INC·Filed 1981·Granted Dec 27, 1983·353 cites·40 claims
- 0297US4476468ASecure transaction card and verification systemLIGHT SIGNATURES INC·Filed 1983·Granted Oct 9, 1984·183 cites·18 claims
- 0393US4816824AMerchandise verification and information systemLIGHT SIGNATURES INC·Filed 1987·Granted Mar 28, 1989·146 cites·14 claims
- 0493US4568936AVerification system for document substance and contentLIGHT SIGNATURES INC·Filed 1984·Granted Feb 4, 1986·100 cites·15 claims
- 0590US4811408AImage dissecting document verification systemLIGHT SIGNATURES INC·Filed 1987·Granted Mar 7, 1989·221 cites·10 claims
- 0686US4795890ADevice authentication system for on and off line useLIGHT SIGNATURES INC·Filed 1987·Granted Jan 3, 1989·151 cites·11 claims
- 0785US4806740AMagnetic characteristic identification systemLIGHT SIGNATURES INC·Filed 1986·Granted Feb 21, 1989·99 cites·17 claims
- 0885US4748679AWeighted-pixel characteristic sensing systemLIGHT SIGNATURES INC·Filed 1986·Granted May 31, 1988·148 cites·14 claims
- 0985US4689477AVerification system for document substance and contentLIGHT SIGNATURES INC·Filed 1985·Granted Aug 25, 1987·143 cites·17 claims
- 1084US4807287ADocument authentication methodLIGHT SIGNATURES INC·Filed 1987·Granted Feb 21, 1989·96 cites·19 claims
- 1184US4546352ANon-counterfeitable document systemLIGHT SIGNATURES INC·Filed 1984·Granted Oct 8, 1985·75 cites·9 claims
- 1281US4785290ANon-counterfeitable document systemLIGHT SIGNATURES INC·Filed 1987·Granted Nov 15, 1988·101 cites·20 claims
- 1379US4558318AMerchandise verification and information systemLIGHT SIGNATURES INC·Filed 1983·Granted Dec 10, 1985·56 cites·11 claims
- 1475US4651150AMerchandise verification and information systemLIGHT SIGNATURES INC·Filed 1985·Granted Mar 17, 1987·43 cites·9 claims
- 1574US4675669ASystem of issuing secure documents of various denominationLIGHT SIGNATURES INC·Filed 1985·Granted Jun 23, 1987·39 cites·12 claims
- 1674US4630845AAuthentication document systemLIGHT SIGNATURES INC·Filed 1983·Granted Dec 23, 1986·45 cites·8 claims
- 1773US4837840ASystem for verifying authenticity of various articlesLIGHT SIGNATURES INC·Filed 1987·Granted Jun 6, 1989·62 cites·4 claims
- 1873US4489318ANon-counterfeitable document systemLIGHT SIGNATURES INC·Filed 1983·Granted Dec 18, 1984·39 cites·10 claims
- 1965US4663622ANon-counterfeitable document systemLIGHT SIGNATURES INC·Filed 1985·Granted May 5, 1987·25 cites·21 claims
- 2062US5023923AProgrammable sensor apertureLIGHT SIGNATURES INC·Filed 1987·Granted Jun 11, 1991·43 cites·6 claims
- 2162US4686527AVerification system for document substance and contentLIGHT SIGNATURES INC·Filed 1985·Granted Aug 11, 1987·32 cites·19 claims
- 2261US4916294ASystem for reliable digital recording on unreliable magnetic mediaLIGHT SIGNATURES INC·Filed 1988·Granted Apr 10, 1990·22 cites·14 claims
- 2360US4739322AMerchandise verification and information systemLIGHT SIGNATURES INC·Filed 1986·Granted Apr 19, 1988·21 cites·14 claims
- 2457US4656473ASecure card and sensing systemLIGHT SIGNATURES INC·Filed 1984·Granted Apr 7, 1987·19 cites·9 claims
- 2549US4734695ASecure card and sensing systemLIGHT SIGNATURES INC·Filed 1986·Granted Mar 29, 1988·15 cites·5 claims
- 2649US4721298ABi-stable paper separatorLIGHT SIGNATURES INC·Filed 1986·Granted Jan 26, 1988·10 cites·7 claims
- 2739US4723071AAnticounterfeit card-sensing mechanismLIGHT SIGNATURES INC·Filed 1985·Granted Feb 2, 1988·9 cites·8 claims
- 2838US4635054AOperator interactive device verification systemLIGHT SIGNATURES INC·Filed 1985·Granted Jan 6, 1987·21 cites·10 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →