Masashi Hirokawa

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Atsugi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for monitoring performance of image forming apparatus
- Patent number 7,420,714
- Issue date Sep 2, 2008
- Ricoh Company, Ltd.
- Masashi Hirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method of transmitting performance measurement data t...
- Patent number 6,697,172
- Issue date Feb 24, 2004
- Ricoh Company, Ltd.
- Masashi Hirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data processing apparatus and system
- Patent number 6,115,144
- Issue date Sep 5, 2000
- Ricoh Company, Ltd.
- Masashi Hirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Facsimile apparatus having function of updating incorporated program
- Patent number 6,104,506
- Issue date Aug 15, 2000
- Ricoh Company, Ltd.
- Masashi Hirokawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Facsimile apparatus
- Patent number 5,936,746
- Issue date Aug 10, 1999
- Ricoh Company, Ltd.
- Masashi Hirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Facsimile apparatus for compressing and storing program related to...
- Patent number 5,640,248
- Issue date Jun 17, 1997
- Ricoh Company, Ltd.
- Masashi Hirokawa
- G06 - COMPUTING CALCULATING COUNTING