CPC Subgroup
G02C 3/02 Arrangements for supporting by headgear
Full Title
Special supporting arrangements for lens assemblies or monocles (lenses therefor G02C7/00; by walking-sticks A45B3/00) > Arrangements for supporting by headgear
G02C 3/02 Special supporting arrangements for lens assemblies or monocles (lenses therefor G02C7/00; by walking-sticks A45B3/00) > Arrangements for supporting by headgear