Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D410727 | Inlet filter | Chaouki A. Khamis, Carl M. Geisz, Michael R. Spearman | 1999-06-08 |
| 4836931 | Reinforced filter tube and method of making the same | Michael R. Spearman, Patrick Richard Spearman | 1989-06-06 |
| 4814033 | Method of making a reinforced filter tube | Michael R. Spearman, Patrick Richard Spearman | 1989-03-21 |