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DIFF Subgroup
G01C 17/28

Electromagnetic compasses (with north seeking magnetic elements and having electric pick-offs G01C17/26)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Electromagnetic compasses

CPC: Electromagnetic compasses (with north seeking magnetic elements and having electric pick-offs G01C17/26)

Full Title

Full titles differ between systems:

IPC:

Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes > Magnetic compasses > Electromagnetic compasses

CPC:

Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes (using gyroscopic effect G01C19/00) > Magnetic compasses > Electromagnetic compasses (with north seeking magnetic elements and having electric pick-offs G01C17/26)

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

Child Classifications

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  • G01C 17/30 Earth-inductor compasses IPC+CPC Available in IPC and CPC
  • G01C 17/32 Electron compasses IPC+CPC Available in IPC and CPC