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For the Inventor, By the Inventor

Osaka, Japan

Sumitmo Electric


USPTO Granted Patents = 1

Forward Citations = 9

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4 inventors (with patents filed for the assignee):

goldMedal Tetsuo Nakai (1 out of 45 patents)

silverMedal Syuzi Yazu (1 out of 1 patent)

bronzeMedal Keizo Asai (1 out of 1 patent)

4.  Yoshiaki Kumazawa (1 out of 1 patent)


1 patent:

1. 4828611 - High hardness sintered compact and process for producing the same (1989-05-09),
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USPTO Data Jan 1 1976 - Sep 22 2026

1 Patents

#1,654 in Osaka

#15,714 in Japan

Osaka, JP
Osaka, Japan

Sumitmo Electric

Forward Citations = 9

4 inventors:

goldMedal Tetsuo Nakai (1 out of 45 patents)

silverMedal Syuzi Yazu (1 out of 1 patent)

bronzeMedal Keizo Asai (1 out of 1 patent)

4.  Yoshiaki Kumazawa (1 out of 1 patent)

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