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Yokosuka, JP
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last 30 patents
Information
Patent Grant
Variable-length reversible image data compression process
Patent number
6,184,997
Issue date
Feb 6, 2001
Ricoh Company, Ltd.
Yoshiaki Hanyu
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Page printer, resolution converting method, and variable-length rev...
Patent number
5,835,685
Issue date
Nov 10, 1998
Ricoh Company, Ltd.
Yoshiaki Hanyu
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Page printer resolution converting method, and variable-length reve...
Patent number
5,704,020
Issue date
Dec 30, 1997
Ricoh Company, Ltd.
Yoshiaki Hanyu
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Image data processing system and method realizing fine image with s...
Patent number
5,666,213
Issue date
Sep 9, 1997
Ricoh Company, Ltd.
Masakazu Ohshita
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Image forming apparatus with security feature which prevents copyin...
Patent number
5,647,010
Issue date
Jul 8, 1997
Ricoh Company, Ltd.
Hiromi Okubo
G07 - CHECKING-DEVICES
Information
Patent Grant
Image processing apparatus for smoothing edges of image
Patent number
5,327,260
Issue date
Jul 5, 1994
Ricoh Company, Ltd.
Mutsuo Shimomae
G06 - COMPUTING CALCULATING COUNTING