Assignee
METROTECH CORP
US29 patents
Top patents by PatentIndex Score
US7062414B2Jun 13, 2006
Method and apparatus for digital detection of electromagnetic signal strength and signal direction in metallic pipes and cables
METROTECH CORP95 citations96
US6407550B1Jun 18, 2002
Line locator with accurate horizontal displacement detection
METROTECH CORP107 citations96
US5043666AAug 27, 1991
Self-calibrating electromagnetic field sensor for locating buried conduits
METROTECH CORP108 citations95
US6130539AOct 10, 2000
Automatic gain control for a line locator
METROTECH CORP73 citations94
US7091872B1Aug 15, 2006
Controlled power source for underground line location
METROTECH CORP76 citations93
US7137308B2Nov 21, 2006
Sliding pipe plug
METROTECH CORP22 citations92
US6815953B1Nov 9, 2004
Detecting field distortion in underground line location
METROTECH CORP67 citations90
US7120564B2Oct 10, 2006
Buried line locator with integral position sensing
METROTECH CORP108 citations88
USD475936SJun 17, 2003
Line locator
METROTECH CORP18 citations86
US7203322B1Apr 10, 2007
Acoustic detector with noise cancellation
METROTECH CORP33 citations80
US10094947B2Oct 9, 2018
System and method for locating underground lines using antenna and positioning information
METROTECH CORP2 citations71
US10768330B2Sep 8, 2020
System and method for locating a marker using a locator with multiple transmitters
METROTECH CORP2 citations70
US7612682B2Nov 3, 2009
Locator with removable antenna portion
METROTECH CORP6 citations68
US10732313B2Aug 4, 2020
System and method for locating underground lines using motion based responsiveness
METROTECH CORP4 citations60
US12455388B2Oct 28, 2025
Underground line locator system with real time kinematic and global satellite positioning
METROTECH CORP0 citations59
US11474262B2Oct 18, 2022
Underground line locator system with real time kinematic and global satellite positioning
METROTECH CORP0 citations59
US10833901B2Nov 10, 2020
Signal select in underground line location
METROTECH CORP1 citations57
US9473203B2Oct 18, 2016
Signal select in underground line location
METROTECH CORP2 citations57
USD488725SApr 20, 2004
Transmitter for a line locating system
METROTECH CORP5 citations56
US10832455B2Nov 10, 2020
System and method for locating underground lines using a view-in-the-ground indicator
METROTECH CORP2 citations55
US11336013B2May 17, 2022
Antenna for underground line location
METROTECH CORP0 citations50
US10162039B2Dec 25, 2018
Systems and methods for object detection
METROTECH CORP0 citations50
US9869744B2Jan 16, 2018
Locator self-test
METROTECH CORP0 citations50
US12537560B2Jan 27, 2026
Data encoding in a low frequency magnetic field
METROTECH CORP0 citations49
US10310130B2Jun 4, 2019
Cable detection apparatus with a comb filter
METROTECH CORP0 citations48
US9877152B2Jan 23, 2018
Auto-locate operation
METROTECH CORP0 citations44
US10578856B2Mar 3, 2020
Camera skid
METROTECH CORP0 citations41
US10063220B2Aug 28, 2018
Signal generator with multiple outputs
METROTECH CORP0 citations41
US10338263B2Jul 2, 2019
Signal processing for a cable locating instrument
METROTECH CORP0 citations40