DIFF Subgroup
G01C 17/18 Supporting or suspending compasses, e.g. by gimbal, by flotation
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 > Supporting or suspending compasses, e.g. by gimbal, by flotation
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 > Supporting or suspending compasses, e.g. by gimbal, by flotation
No child classifications to compare. This is a leaf node in both IPC and CPC.