173322 ⎘
Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops
Sub-classes:METHODS AND SYSTEMS FOR PHASE SENSITIVE ELECTROMAGNETIC SENSING VIA PHYSICALLY SEPARATED TRANSMITTER AND RECEIVER MODULES
#2Metal Detector
#3Redundant Inductive Sensor System and Methods
#4DYNAMIC PRE-BALANCING IN A METAL DETECTOR
#5SENSOR DEVICE
#6INDUCTION LOOP FOR MINERAL EXPLORATION
#7METHOD AND APPARATUS FOR AUTONOMOUS GRAVITY AND/OR MAGNETIC FIELD MEASUREMENT
#8ELECTROMAGNETIC SYSTEM FOR GEOPHYSICAL PROSPECTING
#9METAL DETECTION APPARATUS
#10Metal detection system using search coil-type sensor
#11Foreign object detector
#12Multi-modal object detection system with 5G array
#13Dual detector with transverse coils
#14Dual detector with transverse coils
#15Foreign matter detecting device
#16Fluxgate detector for buried and abandoned chemical weapons
#17Method for operating a metal detector and metal detector
#18System for detecting the passage of a bicycle
#19Intruding metal detection method for induction type power supply system and related supplying-end module
#20System and method for scanning a person before entry to a restricted access area
#21Foreign matter detecting device and linear guide
#22Intruding metal detection method for induction type power supply system and related supplying-end module
#23Sensor apparatus for detecting a target object and a method for operating a sensor apparatus for detecting a target object
#24Multi-frequency metal detector
#25Metal detection devices
#26Metal detection apparatus
#27PORTABLE METAL DETECTOR
#28Metal detection apparatus
#29Methods and apparatus for collocating electromagnetic coils and electronic circuits
#30Metal detector assembly and method of assembling a metal detector
#31Proximity sensor
#32Antenna for underground line location
#33Portable terminal charging device and automobile equipped with same
#34Utility locator apparatus, systems, and methods
#35Apparatus and methods to find a position in an underground formation
#36Coil unit and apparatus for detecting foreign matter
#37Method for detecting metal foreign object on contactless power supply device, contactless power supply device, contactless power reception device, and contactless power supply system
#38Device for detecting and counting metal elements
#39Metal detection apparatus
#40Walk through metal detection system
#41Metal detector with at least one transmit/receive switch
#42POSITION DETECTION APPARATUS AND MEDICAL-DEVICE-POSITION DETECTION SYSTEM
#43Metal detector and ground-penetrating radar hybrid head and manufacturing method thereof
#44ELECTROMAGNETIC ANTENNA AND METHOD OF USE FOR DETECTING OBJECTS
#45METAL DETECTOR FOR SALT SOILS
#46Device for generating a magnetic field in a goal area for taking a goal decision
#47Position detection apparatus and medical-device-position detection system
#48Metal detector with discrimination against metal-mimicking minerals
#49Passive Magnetic Detection System for Security Screening
#50Passenger screening system and method
#51Hybrid-technology metal detector
#52Apparatus and method for establishing the positions of metal objects in an input stream
#53Metal detector
#54Re-configurable induction coil for metal detection
#55Switched coil receiver antenna for metal detector
#56Magnetic material detecting apparatus
#57Radiofrequency surface detection coil
#58Offset feed antennas