Inventor · disambiguated record
David L. Greenaway
Also filed as: GREENAWAY DAVID · GREENAWAY DAVID L · GREENAWAY DAVID LESLIE · LIENHARD HEINZ
14 granted patents·1,296 citations·filing 1976–1986
95Inventor score
Files withLANDIS+GYR AG14
Top patents by PatentIndex Score
14 records- 0198US4184700ADocuments embossed with optical markings representing genuineness informationLANDIS & GYR AG·Filed 1978·Granted Jan 22, 1980·261 cites·7 claims
- 0297US4250217ADocuments embossed with machine-readable information by means of an embossing foilLANDIS & GYR AG·Filed 1976·Granted Feb 10, 1981·112 cites·5 claims
- 0397US4119361AMultilayer identification cardLANDIS & GYR AG·Filed 1976·Granted Oct 10, 1978·129 cites·6 claims
- 0496US4211918AMethod and device for identifying documentsLANDIS & GYR AG·Filed 1978·Granted Jul 8, 1980·138 cites·15 claims
- 0595US4250393APhotoelectric apparatus for detecting altered markingsLANDIS & GYR AG·Filed 1979·Granted Feb 10, 1981·86 cites·8 claims
- 0695US4223050AProcess for embossing a relief pattern into a thermoplastic information carrierLANDIS & GYR AG·Filed 1978·Granted Sep 16, 1980·96 cites·9 claims
- 0793US4662653AOptically diffracting security elementLANDIS & GYR AG·Filed 1984·Granted May 5, 1987·82 cites·10 claims
- 0892US4163570AOptically coded document and method of making sameLANDIS & GYR AG·Filed 1977·Granted Aug 7, 1979·119 cites·7 claims
- 0991US4376887ADevice for the thermal erasure of mechanically readable optical markingsLANDIS & GYR AG·Filed 1979·Granted Mar 15, 1983·92 cites·11 claims
- 1087US4129382AMethod and apparatus for storing and reading authenticating informationLANDIS & GYR AG·Filed 1976·Granted Dec 12, 1978·46 cites·8 claims
- 1179US4143810ADocuments coded by means of machine-readable optical markingsLANDIS & GYR AG·Filed 1976·Granted Mar 13, 1979·38 cites·10 claims
- 1268US4870260AMethod and apparatus for validating valuable documentsLANDIS & GYR AG·Filed 1986·Granted Sep 26, 1989·64 cites·4 claims
- 1368US4297001AProjection screen and method for making sameLANDIS & GYR AG·Filed 1979·Granted Oct 27, 1981·18 cites·22 claims
- 1456US4122435AApparatus and method for producing an electrical signal responsive to handwriting characteristicsLANDIS & GYR AG·Filed 1977·Granted Oct 24, 1978·15 cites·29 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →