136 Utility Patents
#158 in Tokyo
#682 in Japan
#4,945 in the World
Forward Citations = 1,486
Company Filing History:
Hitachi Koki Co., Ltd.


4. 13 out of 1,033
Kabushiki Kaisha Topcon
5. 10 out of 2,559

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