2 Utility Patents
#668 in Sendai
#304,293 in Japan
Forward Citations = 22
Company Filing History:

Zaidan Hojin Handotai Kenkyu Sinkokai
Tsuken Electric Ind. Co., Ltd.
where one patent can have more than one assignee
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#668 in Sendai
#304,293 in Japan
Company Filing History:

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