Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5526879 | Introduction of particulate material into a borehole | Jamieson Edward Champ, William S. Burrows | 1996-06-18 |
| 5237857 | Down-hole liquid detecting apparatus | Richard J. Belshaw, Douglas J. Belshaw | 1993-08-24 |
| 5031452 | Water level probe | Donald A. Toon, Douglas J. Belshaw | 1991-07-16 |