Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10161201 | Powered slip actuation | Robert F. Crane, Mark D. Randa | 2018-12-25 |
| 9915109 | Slip style rod spinner for pipe bursting machine | Robert F. Crane, Walter George Thompson | 2018-03-13 |