3 Utility Patents
#120 in Higashimatsuyama
#236,990 in Japan
Forward Citations = 18
Company Filing History:

I & P Co., Ltd.

4. 1 out of 476
Sumitomo Osaka Cement Co., Ltd.
5. 1 out of 9
Tsubakimoto Kogyo Co. Ltd.
where one patent can have more than one assignee
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