Patent classifications
G
PHYSICS
Load children
G02
OPTICS
Load children
G02B
OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
Load children
13/00
Optical objectives specially designed for the purposes specified below
Load children Filter patents View analytics View as hierarchy
G02B13/02
Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
Filter patents View analytics View as hierarchy