P

Inventor

BUTLER JOHN C

9 patents
⚠️ This page may combine multiple inventors who share the name “BUTLER JOHN C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

COULTER SYSTEMS CORP

6 patents
US4533941AAug 6, 1985

Method and apparatus for half-tone reproduction of a varying tone original image

COULTER SYSTEMS CORP38 citations89
US4515879AMay 7, 1985

Optical mass memory system using electrophotography

COULTER SYSTEMS CORP7 citations70
US4493549AJan 15, 1985

Optical system for imaging an electrophotographic member

COULTER SYSTEMS CORP8 citations70
US4408868AOct 11, 1983

Digital plate maker system and method

COULTER SYSTEMS CORP14 citations70
US4504126AMar 12, 1985

Digital plate maker system and method

COULTER SYSTEMS CORP2 citations59
US4628367ADec 9, 1986

Method and device for reading digital data in an optical mass memory system using electrophotography

COULTER SYSTEMS CORP1 citations44

UNISYS CORP

1 patent
US7181493B2Feb 20, 2007

Platform independent model-based framework for exchanging information in the justice system

UNISYS CORP191 citations93

RICHARD EQUIPMENT COMPANY INC

1 patent
US4266674AMay 12, 1981

Optoelectronic device for automatically inspecting a group of cigarettes or the like

RICHARD EQUIPMENT COMPANY INC54 citations83

EOTRON CORP

1 patent
US4947039AAug 7, 1990

Flat stationary field light beam scanning device

EOTRON CORP9 citations62