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For the Inventor, By the Inventor

Tokyo, Japan

Telegraph & Telephone Pub. Corp.


USPTO Granted Patents = 1

Forward Citations = 5

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4 inventors (with patents filed for the assignee):

goldMedal Koichi Sekiguchi (1 out of 9 patents)

silverMedal Hikaru Takematsu (1 out of 6 patents)

bronzeMedal Kazuyuki Yamamoto (1 out of 3 patents)

4.  Teruyuki Kubo (1 out of 3 patents)


1 patent:

1. 4551583 - Control signal transmission system for key telephone system (1985-11-05),
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USPTO Data Jan 1 1976 - Dec 30 2025

1 Patents

#5,730 in Tokyo

#15,542 in Japan

...
Tokyo, Japan

Telegraph & Telephone Pub. Corp.

Forward Citations = 5

4 inventors:

goldMedal Koichi Sekiguchi (1 out of 9 patents)

silverMedal Hikaru Takematsu (1 out of 6 patents)

bronzeMedal Kazuyuki Yamamoto (1 out of 3 patents)

4.  Teruyuki Kubo (1 out of 3 patents)

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