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For the Inventor, By the Inventor

Tokyo, Japan

Circland Corp.


USPTO Granted Patents = 3

Forward Citations = 12

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1 inventor (with patents filed for the assignee):

goldMedal Hisashi Sato (3 out of 24 patents)


3 patents:

1. D428980 - Air cleaner (2000-08-01),
2. D416318 - Air cleaner (1999-11-09),
3. D392378 - Air cleaner (1998-03-17),
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USPTO Data Jan 1 1976 - Sep 29 2026

3 Patents

#3,541 in Tokyo

#8,915 in Japan

Tokyo, JP
Tokyo, Japan

Circland Corp.

Forward Citations = 12

1 inventor:

goldMedal Hisashi Sato (3 out of 24 patents)

Please report any incorrect information to [email protected]
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