Issued Patents All Time
Showing 1–25 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12410879 | Latch assembly for use with an inversion drum | Craig Lawrence Noggle, Robert F. Crane, Steven W. Wentworth | 2025-09-09 |
| 12281726 | Pipe extraction assisted by pre-stressed strand | Robert F. Crane, Steven W. Wentworth | 2025-04-22 |
| 12092257 | Lead pipe spudding prior to extraction or remediation | Robert F. Crane, Steven W. Wentworth | 2024-09-17 |
| D1018244 | Pipe slitter | Walter George Thompson | 2024-03-19 |
| 11913570 | System for applying torsional force to a buried pipe to facilitate extraction | Steven W. Wentworth, Robert F. Crane | 2024-02-27 |
| 11674354 | Piercing tool aiming device | Larry G. Morse | 2023-06-13 |
| 11619336 | Pipe slitting machine with rope storage reel | Robert F. Crane, Steven W. Wentworth, Kelvin C. Aus | 2023-04-04 |
| 11112033 | Pipe extraction assisted by pre-stressed strand | Robert F. Crane, Steven W. Wentworth | 2021-09-07 |
| 10969053 | Lead pipe spudding prior to extraction or remediation | Robert F. Crane, Steven W. Wentworth | 2021-04-06 |
| 10927602 | Reversible pneumatic pipe ramming tool | Steven W. Wentworth, Robert F. Crane, Kelvin C. Aus | 2021-02-23 |
| 10883628 | Extraction of ductile pipe | Steven W. Wentworth, Robert F. Crane | 2021-01-05 |
| 10584807 | Extraction of ductile pipe | Steven W. Wentworth, Robert F. Crane | 2020-03-10 |
| 10550989 | Latch assembly for use with an inversion drum | Craig Lawrence Noggle, Robert F. Crane, Steven W. Wentworth | 2020-02-04 |
| 10415722 | Split ring ram adapter with cam adjustment | Steven W. Wentworth, Robert F. Crane | 2019-09-17 |
| 10161201 | Powered slip actuation | Steven W. Wentworth, Robert F. Crane | 2018-12-25 |
| D816456 | Gut hook bladed pipe slitter | Robert F. Crane, Walter George Thompson | 2018-05-01 |
| 9566653 | Pipe slitter | Robert F. Crane, Walter George Thompson | 2017-02-14 |
| 9512951 | Pipe slitting apparatus | Robert F. Crane, Walter George Thompson | 2016-12-06 |
| 8955586 | Beacon assembly | Robert F. Crane, Steven W. Wentworth | 2015-02-17 |
| 8955613 | Pneumatic impact tool | — | 2015-02-17 |
| 8875811 | Joint with check valve for a boring apparatus | — | 2014-11-04 |
| 8181714 | Pneumatic impact piercing tool | — | 2012-05-22 |
| 7255516 | Method and apparatus for replacement of underground pipe | Steven W. Wentworth, Robert F. Crane | 2007-08-14 |
| 7086808 | Method and apparatus for on-grade boring | Steven W. Wentworth, Robert F. Crane | 2006-08-08 |
| 7066279 | Pneumatic ground piercing tool | — | 2006-06-27 |