Inventor · disambiguated record
Robert F. Johnston
Also filed as: JOHNSTON JR ROBERT F · JOHNSTON ROBERT F
6 granted patents·71 citations·filing 1974–1986
82Inventor score
Top patents by PatentIndex Score
6 records- 0173US4032934AAutomatic focusing systemHENDRICKSON KENNETH L·Filed 1974·Granted Jun 28, 1977·30 cites·7 claims
- 0270US4459475AAutomatic calibration for D.C. transducersBELL & HOWELL CO·Filed 1982·Granted Jul 10, 1984·17 cites·10 claims
- 0358US4120573AMicrofiche readerBELL & HOWELL CO·Filed 1976·Granted Oct 17, 1978·5 cites·21 claims
- 0452US4668272ASupport and drive system for rotating liquefaction vesselPPG INDUSTRIES INC·Filed 1986·Granted May 26, 1987·13 cites·27 claims
- 0532US4448364AReversible ribbon driveBELL & HOWELL CO·Filed 1982·Granted May 15, 1984·2 cites·4 claims
- 0624US3984846APhotoreceptor assembly for automatic focusing systemGALLAGHER JOHN A·Filed 1975·Granted Oct 5, 1976·4 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →