Keizo Koya

Person

Kanagawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Water-soluble methine compounds useful in photographic silver halid...
- Patent number 5,424,442
- Issue date Jun 13, 1995
- Fuji Photo Film Co., Ltd.
- Keizo Koya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Water-soluble methine compounds useful in photographic silver halid...
- Patent number 5,250,692
- Issue date Oct 5, 1993
- Fuji Photo Film Co., Ltd.
- Keizo Koya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Color image recording method
- Patent number 5,096,801
- Issue date Mar 17, 1992
- Fuji Photo Film Co., Ltd.
- Keizo Koya
- G02 - OPTICS
Information Patent Grant
Silver halide photographic material
- Patent number 5,075,208
- Issue date Dec 24, 1991
- Fuji Photo Film Co., Ltd.
- Hiroyuki Watanabe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Method of forming an image by silver salt diffusion transfer
- Patent number 5,073,473
- Issue date Dec 17, 1991
- Fuji Photo Film Co., Ltd.
- Keizo Koya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Silver halide color photographic material
- Patent number 5,071,729
- Issue date Dec 10, 1991
- Fuji Photo Film Co., Ltd.
- Keizo Koya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Radiation responsive composition
- Patent number 5,049,477
- Issue date Sep 17, 1991
- Fuji Photo Film Co., Ltd.
- Koki Nakamura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Light-sensitive element for the diffusion transfer process
- Patent number 5,021,334
- Issue date Jun 4, 1991
- Fuji Photo Film Co., Ltd.
- Keizo Koya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Silver halide light-sensitive material containing a compound releas...
- Patent number 4,994,363
- Issue date Feb 19, 1991
- Fuji Photo Film Co., Ltd.
- Keizo Koya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Silver halide photographic material and method for forming super hi...
- Patent number 4,965,170
- Issue date Oct 23, 1990
- Fuji Photo Film Co., Ltd.
- Toshinao Ukai
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Heat developable color light-sensitive material with dye developers
- Patent number 4,957,848
- Issue date Sep 18, 1990
- Fuji Photo Film Co., Ltd.
- Osamu Takahashi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photographic light-sensitive material
- Patent number H817
- Issue date Sep 4, 1990
- Fuji Photo Film Co., Ltd.
- Masaharu Toriuchi
- 430 - Radiation imagery chemistry: process, composition, or product thereof
Information Patent Grant
Silver halide photographic materials with reducible brightening age...
- Patent number 4,942,114
- Issue date Jul 17, 1990
- Fuji Photo Film Co., Ltd.
- Keisuke Shiba
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Color diffusion transfer photographic element
- Patent number 4,939,066
- Issue date Jul 3, 1990
- Fuji Photo Film Co., Ltd.
- Masaharu Toriuchi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Silver halide light-sensitive material
- Patent number 4,916,047
- Issue date Apr 10, 1990
- Fuji Photo Film Co., Ltd.
- Keizo Koya
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Light-sensitive material with compounds reactive with dye developers
- Patent number 4,766,056
- Issue date Aug 23, 1988
- Fuji Photo Film Co., Ltd.
- Osamu Takahashi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Person

Patents Grantslast 30 patents

Water-soluble methine compounds useful in photographic silver halid...

Water-soluble methine compounds useful in photographic silver halid...

Color image recording method

Silver halide photographic material

Method of forming an image by silver salt diffusion transfer

Silver halide color photographic material

Radiation responsive composition

Light-sensitive element for the diffusion transfer process

Silver halide light-sensitive material containing a compound releas...

Silver halide photographic material and method for forming super hi...

Heat developable color light-sensitive material with dye developers

Photographic light-sensitive material

Silver halide photographic materials with reducible brightening age...

Color diffusion transfer photographic element

Silver halide light-sensitive material

Light-sensitive material with compounds reactive with dye developers