Patent |
Priority |
Assignee |
Title |
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3972038, |
Mar 28 1975 |
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Accelerometer telemetry system |
3974491, |
Jul 22 1974 |
SmithKline Beckman Corporation |
Load signaling device for a patient's foot |
4258320, |
Nov 03 1972 |
SCHONSTEDT INSTRUMENT COMPANY LLC |
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4387340, |
Jul 31 1980 |
Metrotech, Inc. |
Apparatus for determining the distance to a concealed conductive object which is radiating an alternating current signal |
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Jun 24 1980 |
Schonstedt Instrument Company |
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Jul 31 1980 |
Metrotech, Inc. |
Apparatus including a pair of automatic gain controlled amplifiers for determining the lateral direction to a concealed conductive object |
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Aug 10 1982 |
Schonstedt Instrument Company |
Magnetic detector instrument with board-mounted sensor assembly |
4539522, |
Jun 23 1982 |
Schonstedt Instrument Company |
Magnetic detector apparatus with liquid-supported, conductive, sensor-support tube |
4590425, |
Jun 23 1982 |
Schonstedt Instrument Company |
Magnetic detector apparatus with excitation conductors connected in series via sensor housing |
4639674, |
Apr 11 1983 |
Schonstedt Instrument Company |
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4712094, |
May 29 1986 |
Minnesota Mining and Manufacturing Company |
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Dec 01 1986 |
Schonstedt Instrument Company |
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4803773, |
Aug 01 1986 |
SCHONSTEDT INSTRUMENT COMPANY LLC |
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May 06 1987 |
Schonstedt Instrument Company |
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4839623, |
Dec 01 1986 |
Schonstedt Instrument Company |
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Aug 01 1986 |
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Nov 18 1986 |
Minnesota Mining and Manufacturing Company |
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Jun 05 1989 |
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Mar 15 1989 |
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5014008, |
Jun 28 1988 |
Radiodetection Limited |
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5017873, |
Oct 30 1989 |
SCHONSTEDT INSTRUMENT COMPANY LLC |
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5025150, |
Oct 14 1988 |
WASHINGTON GROUP INTERNATIONAL, INC , AN OHIO CORPORATION |
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5043666, |
Apr 16 1990 |
Metrotech Corporation |
Self-calibrating electromagnetic field sensor for locating buried conduits |
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Sep 18 1989 |
Minnesota Mining and Manufacturing Company |
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Jun 18 1990 |
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5093622, |
Mar 17 1989 |
Minnesota Mining and Manufacturing Company |
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5097211, |
May 25 1990 |
SCHONSTEDT INSTRUMENT COMPANY LLC |
Magnetic detection appartaus with plastic housing and sound-transmissive handle |
5114517, |
Mar 15 1989 |
SCHONSTEDT INSTRUMENT COMPANY LLC |
Methods, apparatus and devices relating to magnetic markers for elongated hidden objects |
5122750, |
Mar 15 1989 |
SCHONSTEDT INSTRUMENT COMPANY LLC |
Methods employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cables |
5136245, |
May 25 1990 |
SCHONSTEDT INSTRUMENT COMPANY LLC |
Magnetic detection apparatus with sensors mounted on channel or angle cantilever support |
5138761, |
May 25 1990 |
SCHONSTEDT INSTRUMENT COMPANY LLC |
Method of manufacturing magnetic detection apparatus |
5173139, |
Mar 15 1989 |
SCHONSTEDT INSTRUMENT COMPANY LLC |
Method for providing magnetic markers on elongated hidden objects |
5206065, |
Mar 15 1989 |
SCHONSTEDT INSTRUMENT COMPANY LLC |
Methods, apparatus and devices relating to magnetic markers for elongated hidden objects |
5214757, |
Aug 07 1990 |
MICHAEL BAKER JR , INC |
Interactive automated mapping system |
5231355, |
Jun 18 1990 |
CHARLES MACHINE WORKS, INC , THE |
Locator transmitter having an automatically tuned antenna |
5239290, |
Mar 25 1992 |
SCHONSTEDT INSTRUMENT COMPANY LLC |
Magnetic cores for saturable core measuring devices and methods of manufacturing such cores |
5260659, |
Feb 13 1989 |
Radiodetection Limited |
Method and apparatus for tracing conductors using an alternating signal having two components related in frequency and phase |
5264795, |
Jun 18 1990 |
The Charles Machine Works, Inc.; CHARLES MACHINE WORKS, INC , THE |
System transmitting and receiving digital and analog information for use in locating concealed conductors |
5361029, |
Jun 18 1990 |
The Charles Machine Works, Inc. |
System for locating multiple concealed underground objects |
5365163, |
Sep 29 1992 |
Minnesota Mining and Manufacturing Company |
Sensor array for circuit tracer |
5373298, |
Oct 08 1992 |
Alcatel Espace |
Method of estimating the error in the calculation of the position of a mobile by a GPS receiver, and GPS receiver for implementing this method |
5430379, |
Aug 27 1993 |
Minnesota Mining and Manufacturing Company |
Conductor locator adapter for electronic markers |
5444364, |
Sep 29 1992 |
Minnesota Mining and Manufacturing Company |
Circuit tracer having an electric field sensor, a differential electric field sensor and an inductive sensor |
5471143, |
Jan 29 1993 |
Minnesota Mining and Manufacturing Co.; Minnesota Mining and Manufacturing |
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5519329, |
Sep 29 1992 |
Minnesota Mining and Manufacturing Company |
Sensor for circuit tracer |
5530357, |
Jun 29 1994 |
Minnesota Mining and Manufacturing Company |
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5543931, |
May 18 1993 |
Goldstar Co., Ltd. |
Apparatus for and method of reproducing digital video signals at a varied speed |
5576973, |
Apr 18 1994 |
Radiodetection Limited |
Apparatus and method for obtaining geographical positional data for an object located underground |
5621325, |
May 16 1995 |
The Charles Machine Works, Inc. |
Avoiding ghosting artifacts during surface location of subsurface transmitters |
5629626, |
Jul 12 1994 |
Leidos, Inc |
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Sep 27 1995 |
AT&T |
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Mar 04 1993 |
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5751289, |
Oct 01 1992 |
University Corporation for Atmospheric Research |
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5764127, |
Mar 17 1995 |
Radiodetection Limited |
Inductive transmitters for conductor location |
5769370, |
Dec 29 1995 |
TOPCON POSITION SYSTEMS, INC ; Topcon GPS LLC |
Knock-down satellite positioning system antenna supporting tripod |
5828219, |
Aug 22 1996 |
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5916300, |
Jul 18 1997 |
Trimble Navigation Limited |
Automatic event recognition to trigger recording changes |
5917325, |
Mar 21 1995 |
Radiodetection Limited |
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5920194, |
May 06 1994 |
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Device for locating objects that emit electromagnetic signals |
5955667, |
Oct 11 1996 |
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Apr 04 1997 |
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Nov 13 1997 |
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Receiver with seamless correction capacity |
6074693, |
Feb 22 1999 |
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6107801, |
Oct 08 1997 |
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Locating an inaccessible object by detecting horizontal and vertical components of a magnetic field |
6127827, |
Jul 22 1994 |
Radiodetection Limited |
Method of identifying a buried cable by applying a low frequency signal to the cable and detecting the resultant field |
6130539, |
Aug 19 1998 |
Metrotech Corporation |
Automatic gain control for a line locator |
6140819, |
May 26 1998 |
Heath Consultants, Inc. |
Continuous-depth-indicating underground pipe and cable locator |
6169958, |
Apr 09 1999 |
Mitsubishi Electric & Electronics USA, Inc |
Ionospheric correction for single frequency GPS receivers using three satellites |
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Aug 01 1997 |
Intel Corporation |
Method and apparatus for personnel detection and tracking |
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Mar 03 1998 |
CASCADE ENGINEERING, INC |
RF embedded identification device |
6234218, |
Oct 13 1999 |
X-Pert Paint Mixing Systems, Inc.; X-PERT PAINT MIXING SYSTEMS, INC |
Semi-automated automotive paint dispensing system |
6268731, |
Mar 07 1997 |
Radiodetection Limited |
Locator of electrically conductive objects |
6297736, |
Jul 16 1997 |
Radiodetection Limited |
Locating concealed conductors |
6299934, |
Feb 22 1999 |
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Thin-client real-time interpretive object tracking system |
6375038, |
Oct 28 1999 |
DAANSEN U S A INC ; DAANSEN USA, INC A CORP OF NEW HAMPSHIRE |
Dispenser having timing means, multisensory output and means of tracking usage number |
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FCA US LLC |
Measuring tool usable with a paint applicator |
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Apr 20 2001 |
STANLEY WORKS, THE |
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6552548, |
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GEOID EXPLORATION LTD ; TOP LINK LTD |
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Electronic marker locator system and method |
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Sep 21 1998 |
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Identification and location of fiber optic cables |
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Surface object locator with level indicator and scribe tip |
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Method and system for remotely servicing a detection device |
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Locating dig alerts on the map by choosing an area on the map |
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