20 Utility Patents
#73 in Fukuoka
#35,815 in Japan
#164,346 in the World
Forward Citations = 223
Company Filing History:
Nippon Tungsten Co., Ltd.
Sumitomo Special Metals Co., Ltd.
Hokuriku Seikei Industrial Co., Ltd.
4. 2 out of 830,757 patents
Other
5. 1 out of 938

where one patent can have more than one assignee
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