It is to be understood that certain structure shown throughout the drawings are for illustrative purposes only and form no part of the claimed design, but is considered necessary to show the environment in which the design is used.
It is to be understood that certain structure shown throughout the drawings are for illustrative purposes only and form no part of the claimed design, but is considered necessary to show the environment in which the design is used.
| Number | Name | Date | Kind |
|---|---|---|---|
| 7136765 | Maier et al. | Nov 2006 | B2 |
| D679616 | Sun | Apr 2013 | S |
| Entry |
|---|
| Ehm, Greg; “Map Quest—Charlottesville, Va., using technology to digitally map gas distribution lines dating back to the 1970s”; www.trenchlesslonline.com; Aug. 2010; Trenchless Technology, p. 34-36. |
| Ehm, Greg; “Project Profile—GPS Goes Underground”; www.GradingandExcavation.com; Jan./Feb. 2010; p. 24-25. |
| “SeekTech® Utility Line Locators” RIGID [Catalog], Ridge Tool Company, a subsidiary of Emerson, part of Emerson Professional Tools™, © 2008 RIDGID, Inc., p. 11.8-11.9. |
| “NaviTrack II Locator” RIGID [Catalog], Ridge Tool Company, a subsidiary of Emerson, part of Emerson Professional Tools™, © 2008 RIDGID, Inc., p. 11.10. |
| “NaviTrack Scout Locator” RIGID [Catalog], Ridge Tool Company, a subsidiary of Emerson, part of Emerson Professional Tools™, © 2008 RIDGID, Inc., p. 11.11. |