20 Utility Patents
#1,943 in Osaka
#36,559 in Japan
#168,887 in the World
Forward Citations = 245
Company Filing History:
Katayama Chemical Works Co., Ltd.
Katayama Chemical, Inc.
Yoshitomi Pharmaceutical Industries, Ltd.
4. 2 out of 181

5. 1 out of 632

where one patent can have more than one assignee
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