Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4691789 | Process for establishing a clear horizontal borehole in a subterranean formation | Walter L. Richards, Roger L. Henderson, George N. Aul | 1987-09-08 |
| 4687060 | Production and grout liner for methane drainage in subterranean boreholes and method | Walter L. Richards, Roger L. Henderson, George N. Aul | 1987-08-18 |