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For the Inventor, By the Inventor

Taipei, Taiwan

Echowell Electronics Co., Ltd.


USPTO Granted Patents = 2

Forward Citations = 3

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1 inventor (with patents filed for the assignee):

goldMedal Hsi-hsien Chen (2 out of 8 patents)


2 patents:

1. 10218320 - Vacuum tube audio amplifier (2019-02-26),
2. 10135402 - Grounding structure and grounding method of vacuum tube audio amplifier (2018-11-20),
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USPTO Data Jan 1 1976 - Oct 6 2026

2 Patents

#1,495 in Taipei

#4,245 in Taiwan

Taipei, TW
Taipei, Taiwan

Echowell Electronics Co., Ltd.

Forward Citations = 3

1 inventor:

goldMedal Hsi-hsien Chen (2 out of 8 patents)

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