Inventor · disambiguated record
Delmar R. Johnson
Also filed as: ERIKSON ROLF B · JOHNSON DELMAR R
7 granted patents·117 citations·filing 1976–1985
86Inventor score
Files withBELL & HOWELL CO7
Top patents by PatentIndex Score
7 records- 0194US4174890AElectronically controlled microfilm photographic image utilization deviceBELL & HOWELL CO·Filed 1978·Granted Nov 20, 1979·34 cites·23 claims
- 0291US4110020AElectronically controlled microfilm photographic image utilization deviceBELL & HOWELL CO·Filed 1976·Granted Aug 29, 1978·25 cites·25 claims
- 0387US4324484AMicrofilm filing systemBELL & HOWELL CO·Filed 1980·Granted Apr 13, 1982·23 cites·28 claims
- 0469US4624558AMicroimage recorderBELL & HOWELL CO·Filed 1985·Granted Nov 25, 1986·12 cites·32 claims
- 0564US4149784ARoll film reader/printer with manually insertable discrete filmBELL & HOWELL CO·Filed 1977·Granted Apr 17, 1979·6 cites·6 claims
- 0663US4087175AAutomatic microfilm camera operated responsive to data input at a computer terminalBELL & HOWELL CO·Filed 1977·Granted May 2, 1978·6 cites·20 claims
- 0756US4198157AAutomatic microfilm camera operated responsive to data input at a computer terminalBELL & HOWELL CO·Filed 1978·Granted Apr 15, 1980·11 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →