Inventor · disambiguated record
Keith A. Penfound
Also filed as: PENFOUND KEITH A
6 granted patents·107 citations·filing 1983–1987
84Inventor score
Files withMINNESOTA MINING & MFG6
Top patents by PatentIndex Score
6 records- 0189US4828962AHigh contrast scanner photographic elements employing ruthenium and iridium dopantsMINNESOTA MINING & MFG·Filed 1987·Granted May 9, 1989·25 cites·26 claims
- 0285US4476220ASpectrally sensitized photothermographic materials and preparation thereofMINNESOTA MINING & MFG·Filed 1983·Granted Oct 9, 1984·23 cites·20 claims
- 0384US4705745APhotographic materials and color proofing systemMINNESOTA MINING & MFG·Filed 1986·Granted Nov 10, 1987·42 cites·22 claims
- 0456US4857450ASilver halide photographic materialsMINNESOTA MINING & MFG·Filed 1987·Granted Aug 15, 1989·7 cites·20 claims
- 0542US4814827APhotographic color proofing apparatusMINNESOTA MINING & MFG·Filed 1987·Granted Mar 21, 1989·7 cites·19 claims
- 0637US4824770AContinuous tone color imaging using laser or light emitting diode sourcesMINNESOTA MINING & MFG·Filed 1987·Granted Apr 25, 1989·3 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →