Calkins; Oscar C.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Calkins; Oscar C..The latest application filed is for "boat support for trailers".
- Calkins; Oscar C. - Spokane WA
| Patent | Date |
|---|---|
| Boat Support For Trailers Grant 3,785,677 - Calkins January 15, 1 | 1974-01-15 |
| Rod Weeder Grant 3,651,870 - Calkins March 28, 1 | 1972-03-28 |
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