Issued Patents All Time
Showing 1–25 of 68 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12410879 | Latch assembly for use with an inversion drum | Craig Lawrence Noggle, Mark D. Randa, Steven W. Wentworth | 2025-09-09 |
| 12281726 | Pipe extraction assisted by pre-stressed strand | Mark D. Randa, Steven W. Wentworth | 2025-04-22 |
| 12092257 | Lead pipe spudding prior to extraction or remediation | Steven W. Wentworth, Mark D. Randa | 2024-09-17 |
| 11913570 | System for applying torsional force to a buried pipe to facilitate extraction | Steven W. Wentworth, Mark D. Randa | 2024-02-27 |
| 11619336 | Pipe slitting machine with rope storage reel | Mark D. Randa, Steven W. Wentworth, Kelvin C. Aus | 2023-04-04 |
| 11112033 | Pipe extraction assisted by pre-stressed strand | Mark D. Randa, Steven W. Wentworth | 2021-09-07 |
| 10969053 | Lead pipe spudding prior to extraction or remediation | Steven W. Wentworth, Mark D. Randa | 2021-04-06 |
| 10927602 | Reversible pneumatic pipe ramming tool | Steven W. Wentworth, Mark D. Randa, Kelvin C. Aus | 2021-02-23 |
| 10883628 | Extraction of ductile pipe | Steven W. Wentworth, Mark D. Randa | 2021-01-05 |
| 10584807 | Extraction of ductile pipe | Steven W. Wentworth, Mark D. Randa | 2020-03-10 |
| 10550989 | Latch assembly for use with an inversion drum | Craig Lawrence Noggle, Mark D. Randa, Steven W. Wentworth | 2020-02-04 |
| 10415722 | Split ring ram adapter with cam adjustment | Steven W. Wentworth, Mark D. Randa | 2019-09-17 |
| 10246949 | Slip style rod spinner for pipe bursting machine | Steven W. Wentworth, Walter George Thompson | 2019-04-02 |
| 10161201 | Powered slip actuation | Steven W. Wentworth, Mark D. Randa | 2018-12-25 |
| D816456 | Gut hook bladed pipe slitter | Mark D. Randa, Walter George Thompson | 2018-05-01 |
| 9915109 | Slip style rod spinner for pipe bursting machine | Steven W. Wentworth, Walter George Thompson | 2018-03-13 |
| 9611696 | Directional drill hammer pullback device | Jon Scharrer | 2017-04-04 |
| 9566653 | Pipe slitter | Mark D. Randa, Walter George Thompson | 2017-02-14 |
| 9512951 | Pipe slitting apparatus | Mark D. Randa, Walter George Thompson | 2016-12-06 |
| 9328760 | Quick connect rods | Steven W. Wentworth | 2016-05-03 |
| 9169946 | Directional drill hammer pullback device | Jon Scharrer | 2015-10-27 |
| 8979435 | Rod pulling and pushing machine for pipe bursting | Steven W. Wentworth | 2015-03-17 |
| 8955586 | Beacon assembly | Mark D. Randa, Steven W. Wentworth | 2015-02-17 |
| 8887833 | Reamer assembly | — | 2014-11-18 |
| 8844655 | Drill string tooling joint | — | 2014-09-30 |