P

Inventor

GARD MICHAEL F

US45 patents
⚠️ This page may combine multiple inventors who share the name “GARD MICHAEL F”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CHARLES MACHINE WORKS

20 patents
US6411094B1Jun 25, 2002

System and method for determining orientation to an underground object

CHARLES MACHINE WORKS127 citations99
US7786731B2Aug 31, 2010

Dipole locator using multiple measurement points

CHARLES MACHINE WORKS47 citations97
US5850624ADec 15, 1998

Electronic compass

CHARLES MACHINE WORKS235 citations97
US7038454B2May 2, 2006

System and method for detecting an underground object using magnetic field sensing

CHARLES MACHINE WORKS62 citations96
US5907242AMay 25, 1999

Balanced passive bandpass filter and preamplifier for a receiver

CHARLES MACHINE WORKS59 citations96
US5621325AApr 15, 1997

Avoiding ghosting artifacts during surface location of subsurface transmitters

CHARLES MACHINE WORKS104 citations95
US7649474B1Jan 19, 2010

System for wireless communication along a drill string

CHARLES MACHINE WORKS37 citations93
US7461707B2Dec 9, 2008

Electric horizontal directional drilling machine system

CHARLES MACHINE WORKS12 citations93
US8981780B2Mar 17, 2015

Dipole locator using multiple measurement points

CHARLES MACHINE WORKS16 citations92
US7663373B1Feb 16, 2010

Determining beacon location using magnetic field ratios

CHARLES MACHINE WORKS28 citations89
US7880336B2Feb 1, 2011

Electric horizontal directional drilling machine system

CHARLES MACHINE WORKS9 citations84
US7759824B2Jul 20, 2010

System and method for detecting an underground object using magnetic field sensing

CHARLES MACHINE WORKS9 citations84
US9752384B2Sep 5, 2017

Electric horizontal directional drilling machine system

CHARLES MACHINE WORKS2 citations73
US10060807B2Aug 28, 2018

Method and system for monitoring bend and torque forces on a drill pipe

CHARLES MACHINE WORKS2 citations68
US12259094B2Mar 25, 2025

Pipeline following sensor arrangement

CHARLES MACHINE WORKS1 citations63
US9850715B2Dec 26, 2017

Modular compaction boring machine system

CHARLES MACHINE WORKS2 citations61
US7999551B2Aug 16, 2011

Method for detection of signal source using estimation of noise statistics

CHARLES MACHINE WORKS3 citations61
US10107931B2Oct 23, 2018

Noise measurement in a locating receiver

CHARLES MACHINE WORKS0 citations52
US10677043B2Jun 9, 2020

External hollow antenna

CHARLES MACHINE WORKS0 citations51
US9995132B2Jun 12, 2018

External hollow antenna

CHARLES MACHINE WORKS1 citations51

ATLANTIC RICHFIELD CO

10 patents

GEN ELECTRIC

7 patents

GARD MICHAEL F

4 patents

US ADMINISTRATOR OF VETERANS A

1 patent

COLE SCOTT B

1 patent

AMOCO CORP

1 patent

BLESSUM DUSTIN L

1 patent