Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5618587 | Vacuum rig apparatus | David R. Markle, Barry Colin Crane, Michael P. Irvine, William Paterson | 1997-04-08 |
| 5596988 | Multi-parameter sensor apparatus | David R. Markle, Barry Colin Crane, Michael P. Irvine, William Paterson | 1997-01-28 |