DIFF Subgroup
G02B 13/06 Panoramic objectives; So-called "sky lenses"
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Optical objectives specially designed for the purposes specified below > Panoramic objectives; So-called "sky lenses"
CPC:
Optical objectives specially designed for the purposes specified below (with variable magnification G02B15/00) > Panoramic objectives; So-called "sky lenses"
No child classifications to compare. This is a leaf node in both IPC and CPC.