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For the Inventor, By the Inventor

Tokyo, Japan

Keytech Co., Ltd.


USPTO Granted Patents = 2

% Expired Patents = 50.0

Forward Citations = 5

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1 inventor (with patents filed for the assignee):

goldMedal Masamichi Sato (2 out of 81 patents)


2 patents:

1. 6493526 - Restoration method for a charging roller, a charging roller restored by the method and a process cartridge installed in the restored charging roller (2002-12-10),
2. 6374071 - Charging unit, a manufacturing method thereof, a charging device using the charging unit, and a transfer device using the same (2002-04-16),
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USPTO Data Jan 1 1976 - Sep 22 2026

2 Patents

#4,374 in Tokyo

#11,165 in Japan

Tokyo, JP
Tokyo, Japan

Keytech Co., Ltd.

Forward Citations = 5

1 inventor:

goldMedal Masamichi Sato (2 out of 81 patents)

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