Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6543551 | Pipe handling device | Darrel W. Sparks, Richard W. McEwen, Arthur D. Deken, Cody L. Sewell, Ronald A. Frazier +2 more | 2003-04-08 |
| 6085852 | Pipe handling device | Darrel W. Sparks, Richard W. McEwen, Arthur D. Deken, Cody L. Sewell, Ronald A. Frazier +1 more | 2000-07-11 |
| 5479728 | Apparatus for backfilling and tamping a trench | Arthur D. Deken, Cody L. Sewell | 1996-01-02 |
| 5361855 | Method and casing for excavating a borehole | Kenneth W. Schuermann, Arthur D. Deken | 1994-11-08 |
| 5212891 | Soft excavator | Kenneth W. Schuermann, Arthur D. Deken | 1993-05-25 |
| 5148880 | Apparatus for drilling a horizontal controlled borehole in the earth | Douglas W. Lee, Arthur D. Deken, Richard P. Dunn | 1992-09-22 |