12 Utility Patents
#17 in Yamagata
#69,780 in Japan
#327,270 in the World
Forward Citations = 68
Company Filing History:

Teikoku Piston Ring Co., Ltd.
Teipi Industry Co., Ltd.
4. 2 out of 832,540 patents
Other
5. 1 out of 60

where one patent can have more than one assignee
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