Oldfelt; Sven
Patent Applications and Registrations
Patent applications and USPTO patent grants for Oldfelt; Sven.The latest application filed is for "vacuum toilet system with treated rinse liquid".
- Oldfelt; Sven - Vaxholm SE
- Oldfelt; Sven - Stockholm SE
| Patent | Date |
|---|---|
| Vacuum toilet system with treated rinse liquid Grant 5,692,250 - Oldfelt , et al. December 2, 1 | 1997-12-02 |
| Vacuum toilet system Grant 5,245,711 - Oldfelt , et al. September 21, 1 | 1993-09-21 |
| Vacuum sewer arrangement Grant 5,165,457 - Olin , et al. * November 24, 1 | 1992-11-24 |
| Vacuum toilet system with simultaneous rinse and discharge Grant 5,007,117 - Oldfelt , et al. April 16, 1 | 1991-04-16 |
| Vacuum sewer arrangement Grant 4,928,326 - Olin , et al. May 29, 1 | 1990-05-29 |
| Vacuum toilet system Grant 4,713,847 - Oldfelt , et al. December 22, 1 | 1987-12-22 |
| Waste water vacuum conveyance method and apparatus Grant 4,246,925 - Oldfelt January 27, 1 | 1981-01-27 |
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