Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4771694 | Blasting signal transmission tube connector | Stephen W. Bartholomew, Daniel C. Rontey, William J. Necker | 1988-09-20 |
| 4730560 | Combination blasting signal transmission tube connector and delay assembly | Stephen W. Bartholomew, Daniel C. Rontey, William J. Necker | 1988-03-15 |