Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4691789 | Process for establishing a clear horizontal borehole in a subterranean formation | Roger L. Henderson, George N. Aul, Barry W. Pauley | 1987-09-08 |
| 4687060 | Production and grout liner for methane drainage in subterranean boreholes and method | Roger L. Henderson, George N. Aul, Barry W. Pauley | 1987-08-18 |
| 4651836 | Process for recovering methane gas from subterranean coalseams | — | 1987-03-24 |
| 4624328 | In-shaft drilling apparatus for recovery of gas from subterranean formations | — | 1986-11-25 |
| 4611855 | Multiple level methane drainage method | — | 1986-09-16 |
| 4600061 | In-shaft drilling method for recovery of gas from subterranean formations | — | 1986-07-15 |
| 4533182 | Process for production of oil and gas through horizontal drainholes from underground workings | — | 1985-08-06 |
| 4452489 | Multiple level methane drainage shaft method | — | 1984-06-05 |