Inventor · disambiguated record
Walter Geffcken
Also filed as: GEFFCKEN WALTER
6 granted patents·18 citations·filing 1976–1985
76Inventor score
Top patents by PatentIndex Score
6 records- 0144US4105288ALiquid crystal display with bistable cholesteric liquid crystal layerSIEMENS AG·Filed 1976·Granted Aug 8, 1978·8 cites·7 claims
- 0231US4066464AOptical glasses with improved varying partial dispersion in the optical positional range of lanthanum crown glasses and lanthanum flint glassesJENAER GLASWERK SCHOTT & GEN·Filed 1976·Granted Jan 3, 1978·4 cites·12 claims
- 0330US4628228AGas discharge display deviceSIEMENS AG·Filed 1985·Granted Dec 9, 1986·2 cites·11 claims
- 0429US4667130AFlat gas discharge displaySIEMENS AG·Filed 1985·Granted May 19, 1987·2 cites·7 claims
- 0529US4625148AGas discharge display device with an auxiliary anode control plateSIEMENS AG·Filed 1985·Granted Nov 25, 1986·2 cites·8 claims
- 0627US4527100AFlat color picture reproduction or video display deviceSIEMENS AG·Filed 1983·Granted Jul 2, 1985·0 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →