Inventor · disambiguated record
John C. Butler
Also filed as: BUTLER JOHN C · BUTLER JOHN CHARLES
9 granted patents·149 citations·filing 1976–1988
88Inventor score
Top patents by PatentIndex Score
9 records- 0183US4533941AMethod and apparatus for half-tone reproduction of a varying tone original imageCOULTER SYSTEMS CORP·Filed 1983·Granted Aug 6, 1985·38 cites·33 claims
- 0276US4266674AOptoelectronic device for automatically inspecting a group of cigarettes or the likeRICHARD EQUIPMENT COMPANY INC·Filed 1979·Granted May 12, 1981·54 cites·21 claims
- 0360US4054928ALaser operated scanning and printing systemMEAD CORP·Filed 1976·Granted Oct 18, 1977·16 cites·9 claims
- 0458US4408868ADigital plate maker system and methodCOULTER SYSTEMS CORP·Filed 1980·Granted Oct 11, 1983·14 cites·39 claims
- 0547US4515879AOptical mass memory system using electrophotographyCOULTER SYSTEMS CORP·Filed 1983·Granted May 7, 1985·7 cites·23 claims
- 0645US4493549AOptical system for imaging an electrophotographic memberCOULTER SYSTEMS CORP·Filed 1983·Granted Jan 15, 1985·8 cites·6 claims
- 0736US4947039AFlat stationary field light beam scanning deviceEOTRON CORP·Filed 1988·Granted Aug 7, 1990·9 cites·19 claims
- 0829US4504126ADigital plate maker system and methodCOULTER SYSTEMS CORP·Filed 1983·Granted Mar 12, 1985·2 cites·2 claims
- 0928US4628367AMethod and device for reading digital data in an optical mass memory system using electrophotographyCOULTER SYSTEMS CORP·Filed 1985·Granted Dec 9, 1986·1 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when John C. Butler files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →