Systems for determining direction or deviation from predetermined direction

Introduced: January 1990

Full Title

Full titles differ between systems:

IPC:

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 > Systems for determining direction or deviation from predetermined direction

CPC:

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 > Systems for determining direction or deviation from predetermined direction

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

IPC defines codes here since 1990.

Child Classifications

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G01S 3/783 using amplitude comparison of signals derived from static detectors or detector systems since 1990 +1 CPC IPC+CPC Available in IPC and CPC
G01S 3/785 using adjustment of orientation of directivity characteristics of a detector or detector system to give a desired condition of signal derived from that detector or detector system since 1990 IPC+CPC Available in IPC and CPC
G01S 3/787 using rotating reticles producing a direction-dependent modulation characteristic since 1990 IPC+CPC Available in IPC and CPC
G01S 3/789 using rotating or oscillating beam systems, e.g. using mirrors, prisms since 1990 IPC+CPC Available in IPC and CPC