Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5750024 | Conical coalescing filter | — | 1998-05-12 |
| 5599448 | Box filter apparatus | — | 1997-02-04 |
| D373637 | Box filter | — | 1996-09-10 |
| 5489352 | Method of sealing filter media within a box filter housing | — | 1996-02-06 |
| 5454945 | Conical coalescing filter and assembly | — | 1995-10-03 |
| D357737 | Box filter | — | 1995-04-25 |
| 5376270 | Box filter | — | 1994-12-27 |
| 5376272 | Filter assembly including a filter and closure member | — | 1994-12-27 |
| 5284997 | Two step filter and process | Eric C. Stender, Patrick Richard Spearman | 1994-02-08 |
| 5250179 | Compactable filter and compactable filter mounting means | — | 1993-10-05 |
| 4836931 | Reinforced filter tube and method of making the same | Patrick Richard Spearman, Daniel M. Spearman | 1989-06-06 |
| 4814033 | Method of making a reinforced filter tube | Patrick Richard Spearman, Daniel M. Spearman | 1989-03-21 |
| 4733449 | Spin connection adsorption filter and method of making same | — | 1988-03-29 |
| 4659467 | Spin connection adsorption filter | — | 1987-04-21 |