John M. Sprainis

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Springfield, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Shoulder-fired firearm primary and secondary recoil attenuator
- Patent number 10,663,252
- Issue date May 26, 2020
- John M. Sprainis
- F41 - WEAPONS
Information Patent Grant
Elastomeric draft gear for a railcar
- Patent number 8,672,151
- Issue date Mar 18, 2014
- WABTEC Corp
- Ronald J. Sprainis
- B61 - RAILWAYS

Patents Applicationslast 30 patents

Information Patent Application
Elastomeric Draft Gear For A Railcar
- Publication number 20130068714
- Publication date Mar 21, 2013
- Wabtec Holding Corp.
- Ronald J. Sprainis
- B61 - RAILWAYS