South Pasadena, CA, United States of America

Charles Chang


USPTO Granted Patents = 2

Forward Citations = 58

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3 inventors (with patents filed for the assignee):

goldMedal Charles E Chang (2 out of 75 patents)

silverMedal Wayne Chiang (1 out of 10 patents)

bronzeMedal Robert J Sheffler (1 out of 33 patents)


2 patents:

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USPTO Data Jan 1 1976 - Sep 29 2026

2 Patents

#10 in South Pasadena, CA

#20,981 in California

#94,730 in US

South Pasadena, CA (US)
South Pasadena, CA, United States of America
Forward Citations = 58

3 inventors:

Please report any incorrect information to [email protected]
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