CPC Subgroup
G01S 3/78 using electromagnetic waves other than radio waves
Full Title
Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received (position-fixing by co-ordinating a plurality of determinations of direction or position lines G01S5/00) > using electromagnetic waves other than radio waves
4 direct subcodes
Child Classifications
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- G01S 3/781 Details
- G01S 3/782 Systems for determining direction or deviation from predetermined direction