Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4597861 | Spiral separator | — | 1986-07-01 |
| 4563279 | Spiral separators | — | 1986-01-07 |
| 4553673 | Method and apparatus for obtaining undercuts of concentrates from pulp flow in spiral separators | — | 1985-11-19 |
| 4545900 | Spiral separators | — | 1985-10-08 |
| 4384650 | Spiral separator | — | 1983-05-24 |
| 4324334 | Spiral separators | Sidney N. Roberts | 1982-04-13 |
| 4304299 | Method for setting and orienting a whipstock in a well conduit | Arvin E. Holland, Alfred R. Curington | 1981-12-08 |
| 4285399 | Apparatus for setting and orienting a whipstock in a well conduit | Arvin E. Holland, John R. Baker, Alfred R. Curington | 1981-08-25 |
| 4277330 | Spiral separators | Sidney N. Roberts | 1981-07-07 |
| 4189378 | Spiral separators | Sidney N. Roberts | 1980-02-19 |