Tadato Hashiguchi

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Original-discrimination system for discriminating special document,...
- Patent number 6,272,248
- Issue date Aug 7, 2001
- Ricoh Company, Ltd.
- Takashi Saitoh
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Original-discrimination system for discriminating special document,...
- Patent number 5,751,854
- Issue date May 12, 1998
- Ricoh Company, Ltd.
- Takashi Saitoh
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Copier having a security function
- Patent number 5,642,199
- Issue date Jun 24, 1997
- Ricoh Company, Ltd.
- Takeshi Ukai
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Specific document discriminating apparatus and image reading appara...
- Patent number 5,602,939
- Issue date Feb 11, 1997
- Richo Company, Ltd.
- Tadato Hashiguchi
- G07 - CHECKING-DEVICES
Information Patent Grant
Image forming apparatus which adds identification information to re...
- Patent number 5,444,518
- Issue date Aug 22, 1995
- Ricoh Company, Ltd.
- Tadato Hashiguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE