Tetsuya Kagawa

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Zama, JP

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Patents Grantslast 30 patents

Information Patent Grant
System for making examination papers and having an automatic markin...
- Patent number 5,775,918
- Issue date Jul 7, 1998
- Ricoh Company, Ltd.
- Masato Yanagida
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
System for making examination papers and having an automatic markin...
- Patent number 5,597,311
- Issue date Jan 28, 1997
- Ricoh Company, Ltd.
- Masato Yanagida
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Motor control apparatus for controlling motor for selectively drivi...
- Patent number 5,097,187
- Issue date Mar 17, 1992
- Ricoh Company, Ltd.
- Takaho Koshiishi
- G05 - CONTROLLING REGULATING