Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5323800 | Washer for a portable self-contained ground water testing assembly | Arthur R. Vollweiler | 1994-06-28 |
| 5275198 | Portable self-contained ground water testing assembly | Arthur R. Vollweiler | 1994-01-04 |