This inventor holds 3 USPTO granted patents. Top assignees: Champion Spark Plug Company, Gas Research Institute, Other. Active years: 1982-1991.
IDiyas Innovation Intelligence. (2026). Inventor Profile: John C Hilliard. Retrieved from https://idiyas.com/inventor/john-c-hilliard
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
% Patents Active = 100.0
Average Co-Inventor Count = 1.7
ph-index = 3
Forward Citations = 103(Granted Patents)
Location History:
- Mount Clemens, MI (US) (1982)
- Ann Arbor, MI (US) (1988 - 1991)
Company Filing History:
1 out of 104 
Champion Spark Plug Company
1 out of 645 
Gas Research Institute
1 out of 834,453 Other
Years Active: 1982-1991
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3 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]
IDiyas Innovation Intelligence. (2026). Inventor Profile: John C Hilliard. Retrieved from https://idiyas.com/inventor/john-c-hilliard
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]
1 patent pending (CIPO):
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]