Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6044714 | Flowmeter for explosion-hazard environments | Francis C. Lowell, William Calder | 2000-04-04 |
| 5006835 | Remote calibrating for pressure transducer | Paul Tessier, Drew G. Koschek | 1991-04-09 |
| 4914642 | Remote sonic location system | David W. Fraser, Francis C. Lowell, Stanley Silverman | 1990-04-03 |