13 Utility Patents
#37 in Gunma-ken
#63,300 in Japan
#296,118 in the World
Forward Citations = 103
Company Filing History:
Yamada Manufacturing Co., Ltd.

where one patent can have more than one assignee
Get your Inventor Badge Today
#37 in Gunma-ken
#63,300 in Japan
#296,118 in the World
Company Filing History:

Get your Inventor Badge Today