Fujio Iwata

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Chiba, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical recording medium including a plurality of diffracted gratin...
- Patent number 5,644,565
- Issue date Jul 1, 1997
- Toppan Printing Co., Ltd.
- Toshiki Toda
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording medium having a plurality of different diffractio...
- Patent number 5,625,619
- Issue date Apr 29, 1997
- Toppan Printing Co., Ltd.
- Toshiki Toda
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recording medium which uses diffraction grating
- Patent number 5,570,338
- Issue date Oct 29, 1996
- Toppan Printing Co., Ltd.
- Toshiki Toda
- G11 - INFORMATION STORAGE
Information Patent Grant
Display having diffraction grating pattern
- Patent number 5,301,062
- Issue date Apr 5, 1994
- Toppan Printing Co., Ltd.
- Susumu Takahashi
- G02 - OPTICS
Information Patent Grant
Method of manufacturing display having diffraction grating patterns
- Patent number 5,132,812
- Issue date Jul 21, 1992
- Toppan Printing Co., Ltd.
- Susumu Takahashi
- G02 - OPTICS