Sprainis; John M.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Sprainis; John M..The latest application filed is for "elastomeric draft gear for a railcar".
- Sprainis; John M. - Springfield OR US
- Sprainis; John M - Springfield OR US
| Patent | Date |
|---|---|
| Shoulder-fired firearm primary and secondary recoil attenuator Grant 10,663,252 - Sprainis , et al. | 2020-05-26 |
| Elastomeric draft gear for a railcar Grant 8,672,151 - Sprainis , et al. March 18, 2 | 2014-03-18 |
| Elastomeric Draft Gear For A Railcar App 20130068714 - Sprainis; Ronald J. ; et al. | 2013-03-21 |
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