IPC Subgroup
G01S 3/78 using electromagnetic waves other than radio waves
Introduced: September 1968
Last revised: January 2006
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 > using electromagnetic waves other than radio waves
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
2 direct subcodes
Child Classifications
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- G01S 3/781 Details
- G01S 3/782 Systems for determining direction or deviation from predetermined direction