Forward Citations = 24

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2 inventors (with patents filed for the assignee):

Dennis M DeFreitas (1 out of 10 patents)

Ervin Jack Sweet (1 out of 3 patents)

1 patent: Sort by Forward Citations

1. 5695328 - Ignition apparatus using electrostatic nozzle and catalytic igniter (1997-12-09),

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USPTO Data Jan 1 1976 - Oct 20 2026

1 Patents

#13 in Richfield, OH

#5,268 in Ohio

#136,919 in US

Richfield, OH, United States of America

Simmonds Precision Engine Systems & Precision Combustion

Forward Citations = 24

2 inventors:

Dennis M DeFreitas (1 out of 10 patents)

Ervin Jack Sweet (1 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Simmonds Precision Engine Systems & Precision Combustion. Retrieved from https://idiyas.com/company/simmonds-precision-engine-systems-and-precision-combustion

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]