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USPTO Data Jan 1 1976 - Oct 20 2026
2 Patents
#10 in South Pasadena, CA
#21,017 in California
#94,905 in US
Charles Chang
Forward Citations = 58
3 inventors:
South Pasadena, CA, United States of America
Charles Chang
Forward Citations = 58
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3 inventors (with patents filed for the assignee):
Charles E Chang (2 out of 75 patents)
Wayne Chiang (1 out of 10 patents)
Robert J Sheffler (1 out of 33 patents)
2 patents:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Charles Chang. Retrieved from https://idiyas.com/company/charles-chang
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]