Kayoko Sugiyama

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electrostatic information recording medium
- Patent number 5,750,238
- Issue date May 12, 1998
- Dai Nippon Printing Co., Ltd.
- Masayuki Iijima
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatic information recording medium
- Patent number 5,721,042
- Issue date Feb 24, 1998
- Dai Nippon Printing Co., Ltd.
- Masayuki Iijima
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Recording medium including latent image charge trap and methods inv...
- Patent number 5,635,971
- Issue date Jun 3, 1997
- Dai Nippon Printing Co., Ltd.
- Takashi Aono
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatic information recording medium
- Patent number 5,527,589
- Issue date Jun 18, 1996
- Dai Nippon Printing Co., Ltd.
- Masayuki Iijima
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Charge carrier medium and reproduction of electrostatic latent image
- Patent number 5,497,179
- Issue date Mar 5, 1996
- Dai Nippon Printing Co., Ltd.
- Takashi Aono
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY