DIFF Subgroup
G01C 17/02 Magnetic compasses
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes > Magnetic compasses
CPC:
Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes (using gyroscopic effect G01C19/00) > Magnetic compasses
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G01C 17/28 Electromagnetic compasses (with north seeking magnetic elements and having electric pick-offs G01C17/26) IPC+CPC Available in IPC and CPC