For the Inventor, By the Inventor

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Sumitmo Electric

USPTO Granted Patents = 1

Forward Citations = 9

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4 inventors (with patents filed for the assignee):

Tetsuo Nakai (1 out of 45 patents)

Syuzi Yazu (1 out of 1 patent)

Keizo Asai (1 out of 1 patent)

4. Yoshiaki Kumazawa (1 out of 1 patent)

1 patent: Sort by Forward Citations

1. 4828611 - High hardness sintered compact and process for producing the same (1989-05-09),

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USPTO Data Jan 1 1976 - Dec 30 2025

1 Patents

#1,488 in Osaka

#15,559 in Japan

Sumitmo Electric

Forward Citations = 9

4 inventors:

Tetsuo Nakai (1 out of 45 patents)

Syuzi Yazu (1 out of 1 patent)

Keizo Asai (1 out of 1 patent)

4. Yoshiaki Kumazawa (1 out of 1 patent)

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