1
Steven Nielsen, Curtis Chambers, Jeffrey Farr, Mark A Conner: Marking system and method with location and/or time tracking. Certus View Technologies, Wolf Greenfield & Sacks P C, December 29, 2009: US07640105 (151 worldwide citation)

A system may dispense a marker, determine location data or time data, and substantially simultaneously trigger the dispensing of the marker and logging of the location data that identifies a geographic location at which the marker is dispensed or the time data that identifies a time at which the mar ...


2
Steven Nielsen, Curtis Chambers, Jeffrey Farr, Greg Block: Methods, apparatus and systems for generating searchable electronic records of underground facility locate and/or marking operations. Certus View Technologies, December 9, 2014: US08907980 (3 worldwide citation)

Manual, semi-automated or automated image-based electronic manifests of locate operations. Image layers may be selectively enabled or disabled for display to facilitate viewing of base images and/or categories of information overlaid on the base image(s) relating to the locate operation. Accuracy in ...