28 Utility Patents
#1,603 in Yokohama
#21,771 in Japan
#101,195 in the World
Forward Citations = 168
Company Filing History:
Ohi Seisakusho Co., Ltd.
Nhk Spring Co., Ltd.

4. 4 out of 1,330

5. 3 out of 28,400

where one patent can have more than one assignee
Get your Inventor Badge Today