9 Utility Patents
#17,740 in Tokyo
#95,268 in Japan
#455,789 in the World
Forward Citations = 186
Company Filing History:

Nippon Telegraph and Telephone Public Corporation

4. 2 out of 6
Hitachi Service Engineering Co., Ltd.
5. 1 out of 45
Takeda Riken Kogyo Kabushiki Kaisha
where one patent can have more than one assignee
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