Blackburn; Robert V.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Blackburn; Robert V..The latest application filed is for "weight transfer roller apparatus".
- Blackburn; Robert V. - Cypress CA
| Patent | Date |
|---|---|
| Weight transfer roller apparatus Grant 4,382,637 - Blackburn , et al. May 10, 1 | 1983-05-10 |
| Weight transfer roller apparatus Grant 4,285,550 - Blackburn , et al. August 25, 1 | 1981-08-25 |
| Skateboard pivot roller Grant 4,149,735 - Blackburn , et al. April 17, 1 | 1979-04-17 |
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