Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10428581 | Well-drilling apparatus and method of use | — | 2019-10-01 |
| 9915113 | Well drilling apparatus and method of use | — | 2018-03-13 |
| 4448267 | Door drilling Kelly | George M. Crawford, Russell C. Crawford, Jr. | 1984-05-15 |
| 4353484 | Coffee filter with flow diverter | — | 1982-10-12 |
| 4324147 | Variable cross section V-belt | — | 1982-04-13 |