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USPTO Data Jan 1 1976 - Oct 6 2026
2 Patents
#7 in Shelburne, VT
#173 in Vermont
#94,782 in US
Planetary Rotor Engine Company
Forward Citations = 27
5 inventors:
Shelburne, VT, United States of America
Planetary Rotor Engine Company
EPO Patents = 1
Forward Citations = 27
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5 inventors (with patents filed for the assignee):
Ronald Joseph Fredricks (1 out of 1 patent)
Richard B Hathaway (1 out of 1 patent)
Alex R Hathaway Shields (1 out of 1 patent)
4. David A Sculthorpe (1 out of 1 patent)
5. William Bennett Ribbens (1 out of 17 patents)
2 patents:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Planetary Rotor Engine Company. Retrieved from https://idiyas.com/company/planetary-rotor-engine-company
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 (EPO):
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]