| 8564295 |
Method for simultaneously determining a plurality of different locations of the buried objects and simultaneously indicating the different locations to a user |
Mark S. Olsson, Jeffrey A. Prsha, Dawn E. Shaffer, Ray Merewether, Michael J. Martin +2 more |
2013-10-22 |
| 8035390 |
Omnidirectional sonde and line locator |
Mark S. Olsson, Ray Merewether, David A. Cox, Michael J. Martin, Thomas K. Kolb +1 more |
2011-10-11 |
| 7619516 |
Single and multi-trace omnidirectional sonde and line locators and transmitter used therewith |
Mark S. Olsson, Jeffrey A. Prsha, Dawn E. Shaffer, Ray Merewether, Michael J. Martin +2 more |
2009-11-17 |
| 7498816 |
Omnidirectional sonde and line locator |
Mark S. Olsson, Ray Merewether, David A. Cox, Michael J. Martin, Thomas R. Kolb +1 more |
2009-03-03 |
| 7009399 |
Omnidirectional sonde and line locator |
Mark S. Olsson, Ray Merewether, David A. Cox, Michael J. Martin, Thomas R. Kolb +1 more |
2006-03-07 |
| 6545704 |
Video pipe inspection distance measuring system |
Mark S. Olsson, David A. Cox |
2003-04-08 |