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For the Inventor, By the Inventor

Tokyo, Japan

Vpec, Inc.


USPTO Granted Patents = 3

% Expired Patents = 33.3


Forward Citations = 9

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3 inventors (with patents filed for the assignee):

goldMedal Satoshi Nagata (3 out of 1,089 patents)

silverMedal Kaoru Koyanagi (1 out of 4 patents)

bronzeMedal Akio Tanaka (1 out of 33 patents)


3 patents:

1. 9018795 - Alternating current autonomous distributed AC power system (2015-04-28),
2. 8415827 - Electric power system (2013-04-09),
3. 8401708 - Electric power system (2013-03-19),
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USPTO Data Jan 1 1976 - Sep 15 2026

3 Patents

#3,556 in Tokyo

#8,949 in Japan

Tokyo, JP
Tokyo, Japan

Vpec, Inc.

Forward Citations = 9

3 inventors:

goldMedal Satoshi Nagata (3 out of 1,089 patents)

silverMedal Kaoru Koyanagi (1 out of 4 patents)

bronzeMedal Akio Tanaka (1 out of 33 patents)

Please report any incorrect information to [email protected]
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