This inventor holds 2 USPTO granted patents and 1 published patent application. Top assignee: Gundle Lining Construction Corporation. Active years: 1992-1994.
IDiyas Innovation Intelligence. (2026). Inventor Profile: John L Spencer. Retrieved from https://idiyas.com/inventor/john-l-spencer
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
USPTO Granted Patents = 2 (Patent Applications = 1)
% Patents Active = 100.0
Average Co-Inventor Count = 1.0
ph-index = 2
Forward Citations = 44(Granted Patents)
Company Filing History:
Years Active: 1992-1994
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2 patents (USPTO):Explore Patents
Profile summary based on public USPTO records.
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]
1 patent pending:
IDiyas Innovation Intelligence. (2026). Inventor Profile: John L Spencer. Retrieved from https://idiyas.com/inventor/john-l-spencer
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]
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]