Inventor · disambiguated record
Donald R. Christensen
Also filed as: CHRISTENSEN DONALD R · CHRISTENSEN DONALD RAGNVALD
7 granted patents·234 citations·filing 1975–1992
87Inventor score
Files withGRASS VALLEY GROUP2KING SEELEY THERMOS CO2BATEMAN ROBERT1CHRISTENSEN DONALD RAGNVALD1THE GRASS VALLEY GROUP INC1
Top patents by PatentIndex Score
7 records- 0193US4947440AShaping of automatic audio crossfadeGRASS VALLEY GROUP·Filed 1988·Granted Aug 7, 1990·112 cites·5 claims
- 0288US4885792AAudio mixer architecture using virtual gain control and switchingGRASS VALLEY GROUP·Filed 1988·Granted Dec 5, 1989·53 cites·6 claims
- 0377US4254896AIce dispensing machine having an agitator and a fixed deflectorKING SEELEY THERMOS CO·Filed 1978·Granted Mar 10, 1981·28 cites·20 claims
- 0474USD349290SController for a video editing systemTHE GRASS VALLEY GROUP INC·Filed 1992·Granted Aug 2, 1994·23 cites·1 claims
- 0559US4277002AIce dispensing mechanismKING SEELEY THERMOS CO·Filed 1979·Granted Jul 7, 1981·15 cites·21 claims
- 0625US3970193ALatchable matchbook with dividing striking stripCHRISTENSEN DONALD RAGNVALD·Filed 1975·Granted Jul 20, 1976·2 cites·4 claims
- 0724US4920311AUser selection of meter ballisticsBATEMAN ROBERT·Filed 1988·Granted Apr 24, 1990·1 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →