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For the Inventor, By the Inventor

Tokyo, Japan

Tokyo Kokyu Rozai Co., Ltd.


USPTO Granted Patents = 2

Forward Citations = 9

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12 inventors (with patents filed for the assignee):

goldMedal Junshiro Hayakawa (2 out of 3 patents)

silverMedal Kazuhisa Shobu (1 out of 13 patents)

bronzeMedal Tadahiko Watanabe (1 out of 25 patents)

4.  Yuji Enomoto (1 out of 11 patents)

5.  Osamu Yagishita (1 out of 3 patents)

6.  Hideki Yamamoto (1 out of 4 patents)

7.  Eiichi Sudoh (1 out of 2 patents)

8.  Hiroshi Uchiyama (1 out of 1 patent)

9.  Kazunobu Kakimoto (1 out of 2 patents)

10.  Yoshio Fujiwara (1 out of 1 patent)

11.  Shigeru Yamagishi (1 out of 1 patent)

12.  Yuko Tsuya (1 out of 3 patents)


2 patents:

1. 4808557 - Sintered titanium carbo-nitride ceramics (1989-02-28),
2. 3939079 - Filter medium which permits increased amount of filtration (1976-02-17),
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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#4,062 in Tokyo

#10,962 in Japan

...
Tokyo, Japan

Tokyo Kokyu Rozai Co., Ltd.

Forward Citations = 9

12 inventors:

goldMedal Junshiro Hayakawa (2 out of 3 patents)

silverMedal Kazuhisa Shobu (1 out of 13 patents)

bronzeMedal Tadahiko Watanabe (1 out of 25 patents)

4.  Yuji Enomoto (1 out of 11 patents)

5.  Osamu Yagishita (1 out of 3 patents)

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