31 Utility and 2 Design Patents
#3,787 in Tokyo
#18,091 in Japan
#83,291 in the World
rank by utility patentsForward Citations = 275
Company Filing History:
Takenaka Corporation


4. 4 out of 5
Tree Field, Inc.
5. 4 out of 13
Daito Giken, Inc.
where one patent can have more than one assignee
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