David T. Southby

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West Harrow, GB

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Patents Grantslast 30 patents

Information Patent Grant
Photographic color developer compositions
- Patent number 4,482,626
- Issue date Nov 13, 1984
- Eastman Kodak Company
- Peter J. Twist
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Dye image-generating photographic elements
- Patent number 4,471,049
- Issue date Sep 11, 1984
- Eastman Kodak Company
- Roy King
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Blocked benzotriazole compounds as development restrainer precursors
- Patent number 4,256,881
- Issue date Mar 17, 1981
- Eastman Kodak Company
- Michael J. Simons
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Development restrainer precursors for photographic elements
- Patent number 4,255,510
- Issue date Mar 10, 1981
- Eastman Kodak Company
- Michael J. Simons
- C07 - ORGANIC CHEMISTRY