6 Utility Patents
#293 in Musashino
#139,573 in Japan
#695,828 in the World
Forward Citations = 10
Company Filing History:
Japanese National Railways
Hakusan Seisakusho Co., Ltd.

4. 1 out of 1
Sumitomo Metal Technology Inc.
5. 1 out of 1
Sumikin Osaka Plant Engineering Co., Ltd.
where one patent can have more than one assignee
Get your Inventor Badge Today