42 Utility and 1 Design Patents
#2,451 in Tokyo
#10,975 in Japan
#52,852 in the World
rank by utility patentsForward Citations = 39
Company Filing History:

Hitachi Industrial Equipment Systems Co., Ltd.

4. 2 out of 108

5. 1 out of 14
Tokyo Keiki Inc.
where one patent can have more than one assignee
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