Keith A. Penfound

Person

Saffron Walden, GB

People

Patents Grantslast 30 patents

Information Patent Grant
Silver halide photographic materials
- Patent number 4,857,450
- Issue date Aug 15, 1989
- Minnesota Mining and Manufacturing Company
- Ronald W. Burrows
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
High contrast scanner photographic elements employing ruthenium and...
- Patent number 4,828,962
- Issue date May 9, 1989
- Minnesota Mining and Manufacturing Company
- Nicholas E. Grzeskowiak
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Continuous tone color imaging using laser or light emitting diode s...
- Patent number 4,824,770
- Issue date Apr 25, 1989
- Minnesota Mining and Manufacturing Company
- Jonathan P. Kitchin
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photographic color proofing apparatus
- Patent number 4,814,827
- Issue date Mar 21, 1989
- Minnesota Mining and Manufacturing Company
- Jonathan P. Kitchin
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photographic materials and color proofing system
- Patent number 4,705,745
- Issue date Nov 10, 1987
- Minnesota Mining and Manufacturing Company
- Jonathan P. Kitchin
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Spectrally sensitized photothermographic materials and preparation...
- Patent number 4,476,220
- Issue date Oct 9, 1984
- Minnesota Mining and Manufacturing Company
- Keith A. Penfound
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Keith A. Penfound

Person

Patents Grantslast 30 patents

Silver halide photographic materials

High contrast scanner photographic elements employing ruthenium and...

Continuous tone color imaging using laser or light emitting diode s...

Photographic color proofing apparatus

Photographic materials and color proofing system

Spectrally sensitized photothermographic materials and preparation...