Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5123643 | Ball throwing apparatus | Kathleen P. Heilhecker | 1992-06-23 |
| 5053082 | Process and apparatus for cleaning particulate solids | David A. Flanigan, Robert E. Williams | 1991-10-01 |
| 4836302 | Apparatus and method for removing and recovering oil and/or other oil-based drilling mud additives from drill cuttings | Robert E. Williams, William H. Marshall | 1989-06-06 |
| 4485697 | Kelly spinner | James D. Rodgers, Steven C. Gaare | 1984-12-04 |
| 4341627 | Screen separator | — | 1982-07-27 |
| 4319410 | Dryer system for drilling mud cuttings | David D. Schoeneman | 1982-03-16 |
| 4250974 | Apparatus and method for detecting abnormal drilling conditions | Leon Robinson, Beldon A. Peters | 1981-02-17 |