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USPTO Data Jan 1 1976 - Oct 13 2026
2 Patents
#247 in Plano, TX
#6,299 in Texas
#94,841 in US
The North American Coal Corporation
Forward Citations = 1
3 inventors:
Plano, TX, United States of America
The North American Coal Corporation
Trademarks = 2
Forward Citations = 1
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3 inventors (with patents filed for the assignee):
David P Liffrig (2 out of 2 patents)
Ernie B Mills (2 out of 2 patents)
David Vaughn (2 out of 10 patents)
2 patents:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: The North American Coal Corporation. Retrieved from https://idiyas.com/company/north-american-coal
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]