Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5979508 | Pipe protector | — | 1999-11-09 |
| RE33793 | Apparatus and method for forming an enlarged underground arcuate bore and installing a conduit therein | Martin D. Cherrington | 1992-01-14 |
| 4785885 | Method and apparatus for cementing a production conduit within an underground arcuate bore | Martin D. Cherrington | 1988-11-22 |
| 4784230 | Apparatus and method for installing a conduit within an arcuate bore | Martin D. Cherrington | 1988-11-15 |
| 4679637 | Apparatus and method for forming an enlarged underground arcuate bore and installing a conduit therein | Martin D. Cherrington | 1987-07-14 |