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For the Inventor, By the Inventor

Saitama, Japan

V Spark Co., Ltd.


USPTO Granted Patents = 2


Forward Citations = 3

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1 inventor (with patents filed for the assignee):

goldMedal Masayuki Kawasaki (2 out of 10 patents)


2 patents:

1. 9969205 - Pressure fluctuation buffering mechanism and applicator (2018-05-15),
2. 9796207 - Writing instrument (2017-10-24),
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USPTO Data Jan 1 1976 - Jan 6 2026

2 Patents

#157 in Saitama 343-0827

#10,966 in Japan

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Saitama, Japan

V Spark Co., Ltd.

Forward Citations = 3

1 inventor:

goldMedal Masayuki Kawasaki (2 out of 10 patents)

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