Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9134095 | Verticalness indicating apparatus for use with archery sights | — | 2015-09-15 |
| 5887655 | Wellbore milling and drilling | David M. Haugen, William A. Blizzard, Jr., Mark W. Schnitker, Steve R. Delgado, Thurman B. Carter +4 more | 1999-03-30 |
| 5887668 | Wellbore milling-- drilling | David M. Haugen, Frederick T. Tilton, Randy P. Hutchings, Guy L. McClung, III, Steve R. Delgado | 1999-03-30 |