Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| H805 | Exhalation duct | John G. Schriver, William L. Riffel, Jr. | 1990-08-07 |
| 4864654 | Protective hood jacket resistant to toxic environments | John G. Schriver, William L. Riffel, Jr., Alan E. George | 1989-09-12 |