Oakland, CA, United States of America

Key Source International


USPTO Granted Patents = 3

% Expired Patents = 33.3

Trademarks = 2

Forward Citations = 17

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4 inventors (with patents filed for the assignee):

goldMedal Robert A D Schwartz (2 out of 7 patents)

silverMedal David E Baker (2 out of 2 patents)

bronzeMedal Philip J Bruno (1 out of 7 patents)

4.  Phillip J Bruno (1 out of 1 patent)


3 patents:

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USPTO Data Jan 1 1976 - Oct 13 2026

3 Patents

#126 in Oakland, CA

#16,858 in California

#73,860 in US

Oakland, CA (US)
Oakland, CA, United States of America
Forward Citations = 17

4 inventors:

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Key Source International. Retrieved from https://idiyas.com/company/key-source-international

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]
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