Issued Patents 2021
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11112033 | Pipe extraction assisted by pre-stressed strand | Robert F. Crane, Mark D. Randa | 2021-09-07 |
| 10969053 | Lead pipe spudding prior to extraction or remediation | Robert F. Crane, Mark D. Randa | 2021-04-06 |
| 10927602 | Reversible pneumatic pipe ramming tool | Robert F. Crane, Mark D. Randa, Kelvin C. Aus | 2021-02-23 |
| 10883628 | Extraction of ductile pipe | Robert F. Crane, Mark D. Randa | 2021-01-05 |