with north-seeking magnetic elements, e.g. needles

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 > with north-seeking magnetic elements, e.g. needles

CPC:

Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes (using gyroscopic effect G01C19/00) > Magnetic compasses > with north-seeking magnetic elements, e.g. needles

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

Child Classifications

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G01C 17/06 Suspending magnetic elements IPC+CPC Available in IPC and CPC
G01C 17/10 Comparing observed direction with north indication IPC+CPC Available in IPC and CPC
G01C 17/18 Supporting or suspending compasses, e.g. by gimbal, by flotation IPC+CPC Available in IPC and CPC
G01C 17/20 Observing the compass card or needle IPC+CPC Available in IPC and CPC