Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6044714 | Flowmeter for explosion-hazard environments | Allen B. Griswold, William Calder | 2000-04-04 |
| 5228347 | Method and apparatus for measuring flow by using phase advance | Richard H. Lyon | 1993-07-20 |
| 4914642 | Remote sonic location system | David W. Fraser, Allen B. Griswold, Stanley Silverman | 1990-04-03 |
| 4432243 | Flow calculator with velocity curve fitting circuit means | Thomas K. Campbell | 1984-02-21 |