DIFF Subgroup
G01C 17/34 Sun- or astro-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 > Sun- or astro-compasses
CPC:
Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes (using gyroscopic effect G01C19/00) > Sun- or astro-compasses
No child classifications to compare. This is a leaf node in both IPC and CPC.