20 Utility Patents
#142 in Kanagawa-ken
#36,559 in Japan
#168,885 in the World
Forward Citations = 275
Company Filing History:

Yamamoto Chemicals, Inc.

4. 1 out of 2
Mitsui Toatsu Kagaku Kabushiki Kaisha (mitsui Toatsu Chem., Inc.)
5. 1 out of 1,227
Nhk Spring Co., Ltd.
where one patent can have more than one assignee
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