Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4708830 | Seal assembly | Charles G. Shepherd | 1987-11-24 |
| 4691689 | One piece adjustable damper | Charles G. Shepherd | 1987-09-08 |
| 4540530 | Humidifier pad | Robert A. Wignall | 1985-09-10 |