A method and apparatus of discrimination detection using multipl

Active magnetic anomaly sensing array and processing system

Active magnetic anomaly sensing system having synchronized...

Adaptive multichannel locator system for multiple proximity...

Adaptive multichannel locator system for multiple proximity...

Alternating current induction method using an annular magnetic c

Amorphous metal tagging system for underground structures includ

An above-ground arrangement for and method of locating a discret

Antenna assembly for microwave reflection survey equipment

Anti-falsing and zero nulling search head for a metal detector

Apparatus allowing continuous radio detection of underground...

Apparatus and method employing extraneous field compensation for

Apparatus and method for detecting a weak induced magnetic field

Apparatus and method for detecting an underground cable...

Apparatus and method for detecting magnetically detectable plast

Apparatus and method for detecting the location of metallic obje

Apparatus and method for imaging metallic objects using an array

Apparatus and method for locating an object

Apparatus and method for locating and tracking magnetic objects

Apparatus and method for locating metal objects and minerals in