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For the Inventor, By the Inventor

Tokyo, Japan

Viva Co., Ltd.


USPTO Granted Patents = 3

Trademarks = 1

Forward Citations = 117

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2 inventors (with patents filed for the assignee):

goldMedal Akira Yaoita (2 out of 2 patents)

silverMedal Tetsuya Takizawa (1 out of 1 patent)


3 patents:

1. 7503426 - Reflecting plate type silencer pipe (2009-03-17),
2. 4905290 - Howling protective apparatus (1990-02-27),
3. 4254303 - Automatic volume adjusting apparatus (1981-03-03),
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USPTO Data Jan 1 1976 - Dec 16 2025

3 Patents

#3,267 in Tokyo

#8,766 in Japan

...
Tokyo, Japan

Viva Co., Ltd.

Forward Citations = 117

2 inventors:

goldMedal Akira Yaoita (2 out of 2 patents)

silverMedal Tetsuya Takizawa (1 out of 1 patent)

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