Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11263538 | Predicting paths of underground utilities | — | 2022-03-01 |
| 10705249 | Electronic marker with integral level indicator | — | 2020-07-07 |
| 9057162 | Manhole marker | — | 2015-06-16 |
| 8400156 | Installation of service tee marker fixture having disk marker and concentric attachment sleeve | — | 2013-03-19 |
| 8137220 | Electronic marker stakes for sports fields | — | 2012-03-20 |
| 8070630 | Electronic marker stakes for sports fields | — | 2011-12-06 |
| 7915894 | Service tee marker fixture with concentric attachment sleeve | — | 2011-03-29 |
| 7901306 | Electronic marker stakes for sports fields | — | 2011-03-08 |
| 7692594 | Pop-up cable electronic marker | — | 2010-04-06 |
| 7382266 | Surface tracker | — | 2008-06-03 |
| 7237810 | Plastic pipe adhesive joint | Elmont E. Hollingsworth | 2007-07-03 |
| 7081820 | Surface tracker | — | 2006-07-25 |
| D514970 | Utility structure guard | — | 2006-02-14 |
| 6538446 | Closure guard with electronic marker and perforated carrier sheet | — | 2003-03-25 |
| 6271667 | Buried closure guard with electronic marker | — | 2001-08-07 |
| 6133738 | Detectable transponder reel housing | — | 2000-10-17 |
| 6049279 | Detectable transponder conduit end cap | — | 2000-04-11 |
| 5567914 | Splice closure with animal protection | Kenneth D. Rebers | 1996-10-22 |
| 5116654 | Self-dispensing spaced electronic markers | Armond D. Cosman, Gary H. Knippelmier | 1992-05-26 |
| 5045368 | Self-dispensing spaced electronic markers | Armond D. Cosman, David C. Worboys | 1991-09-03 |
| 5017415 | Self-dispensing spaced electronic markers | Armond D. Cosman, Gary H. Knippelmier | 1991-05-21 |
| 4947012 | Electrofusion marker | — | 1990-08-07 |
| 4866388 | System and method with passive resonant circuit markers for locating buried electrical conductors | Armond D. Cosman | 1989-09-12 |
| 4767237 | Marking tape with wire conductors and methods for use | Armond D. Cosman | 1988-08-30 |