Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4998435 | Method and apparatus for leak testing of pipe | Arthur L. Dwyer, Darwin A. Miller, Darwin L. Miller | 1991-03-12 |
| 4879896 | Method and apparatus for leak testing of pipe | Arthur L. Dwyer, Darwin A. Miller, Darwin L. Miller | 1989-11-14 |
| 4727749 | Method and apparatus for leak testing of pipe | Arthur L. Dwyer, Darwin A. Miller, Darwin L. Miller | 1988-03-01 |
| 4601194 | Method and apparatus for leak testing of pipe | Arthur L. Dwyer, Darwin A. Miller, Darwin L. Miller | 1986-07-22 |
| 4517828 | Apparatus for leak testing of pipe | Darwin L. Miller | 1985-05-21 |