Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5461906 | Apparatus for confirming the presence of a leak in a liquid storage tank | John E. Tuma, Barry N. Williams | 1995-10-31 |
| 5319956 | Method of confirming the presence of a leak in a liquid storage tank | John E. Tuma, Barry N. Williams | 1994-06-14 |