KP

Keith A. Penfound

3M: 6 patents #2,536 of 11,543Top 25%
Overall (All Time): #894,401 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4857450 Silver halide photographic materials Ronald W. Burrows, Bernard A. Lea 1989-08-15
4828962 High contrast scanner photographic elements employing ruthenium and iridium dopants Nicholas E. Grzeskowiak 1989-05-09
4824770 Continuous tone color imaging using laser or light emitting diode sources Jonathan P. Kitchin, Stephen R. Powers, Peter J. Finn 1989-04-25
4814827 Photographic color proofing apparatus Jonathan P. Kitchin, Stephen R. Powers, Peter J. Finn, Michael G. Fisher 1989-03-21
4705745 Photographic materials and color proofing system Jonathan P. Kitchin, Stephen R. Powers, Peter J. Finn, Michael G. Fisher 1987-11-10
4476220 Spectrally sensitized photothermographic materials and preparation thereof 1984-10-09