6 Utility Patents
#289 in Amagasaki
#139,131 in Japan
#691,187 in the World
Forward Citations = 38
Company Filing History:
Sumitomo Pipe & Tube Co., Ltd.
Sumitomo Metal Industries, Inc.

4. 2 out of 41

5. 2 out of 2,421

where one patent can have more than one assignee
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