42 Utility and 1 Design Patents
#97 in Chiba
#10,966 in Japan
#52,773 in the World
rank by utility patentsForward Citations = 1,112
Company Filing History:
Seikoh Giken Co., Ltd.

Sanwa Denki Kogyo Co., Ltd.
4. 1 out of 2
Telegraph and Telephone Corporation
5. 1 out of 1
Nippon Telegraph and Telephone Corporation and Seikoh Giken Co., Ltd.
where one patent can have more than one assignee
Get your Inventor Badge Today