8 Utility Patents
#116 in Sayama
#107,257 in Japan
#519,767 in the World
Forward Citations = 59
Company Filing History:

Other
Teikoku Piston Ring Co., Ltd.
4. 1 out of 1,145
Yoshida Kogyo K.k.
5. 1 out of 4
Toyo Aluminum K.k.
where one patent can have more than one assignee
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