Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5357241 | Fail-safe leak detector | James Gerard Welch, James W. Simmons | 1994-10-18 |
| 5229750 | Fail-safe leak detector including independent and repetetive sensing means | James Gerard Welch, James W. Simmons | 1993-07-20 |