Inventor · disambiguated record
Darwin E. Chapman
Also filed as: CHAPMAN DARWIN E
6 granted patents·31 citations·filing 1976–1979
79Inventor score
Top patents by PatentIndex Score
6 records- 0160US4203668ADigital exposure meterCREATIVE PHOTOTRONICS INC·Filed 1978·Granted May 20, 1980·16 cites·19 claims
- 0257US4299481AAdjustable current lamphouseCIBA GEIGY AG·Filed 1979·Granted Nov 10, 1981·5 cites·2 claims
- 0350USD260138SPhotograpic timerCHAPMAN DARWIN E·Filed 1979·Granted Aug 11, 1981·5 cites·1 claims
- 0441USD259198SDigital exposure meterCREATIVE PHOTOTRONICS INC·Filed 1978·Granted May 12, 1981·3 cites·1 claims
- 0534USD246461SDarkroom exposure meter and densitometerCHAPMAN DARWIN E·Filed 1976·Granted Nov 22, 1977·2 cites·1 claims
- 0626USD257355SMotorized base for use in developing photographic printsCREATIVE PHOTOTRONICS INC·Filed 1978·Granted Oct 14, 1980·0 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →