Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7539601 | Energy efficient air handling system for cleanrooms | — | 2009-05-26 |
| 7156898 | Low pressure drop deep electrically enhanced filter | — | 2007-01-02 |
| 5627376 | Wire corona charging apparatus | Tim G. Christensen | 1997-05-06 |
| 5425265 | Apparatus and method for measuring the capillary pressure distribution of porous materials | — | 1995-06-20 |
| 5403383 | Safe ionizing field electrically enhanced filter and process for safely ionizing a field of an electrically enhanced filter | — | 1995-04-04 |
| 4853005 | Electrically stimulated filter method and apparatus | Thomas A. Hamade, Clyde W. Hawley | 1989-08-01 |
| 4579637 | Method and apparatus for separating impurities from low conductivity liquids | Robert A. Fjeld | 1986-04-01 |
| 4385986 | Gravity separator for separating liquids | Gregory S. Sprenger | 1983-05-31 |
| 4374029 | Regenerative filter | — | 1983-02-15 |
| 4315822 | Process and apparatus for separating liquids | — | 1982-02-16 |
| 4253954 | Two-stage spin-on separating device | David Midkiff | 1981-03-03 |