Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5996690 | Apparatus for controlling and monitoring a downhole oil/water separator | Christopher K. Shaw, Michael H. Johnson | 1999-12-07 |
| 5762149 | Method and apparatus for well bore construction | Joseph F. Donovan, Michael H. Johnson, Daniel J. Turick, Larry Watkins | 1998-06-09 |