DIFF Subgroup
C03B 23/22 Uniting glass lenses, e.g. forming bifocal lenses
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Re-forming shaped glass > Uniting glass pieces by fusing without substantial reshaping > Uniting glass lenses, e.g. forming bifocal lenses
CPC:
Re-forming shaped glass (re-forming fibres or filaments C03B37/14) > Uniting glass pieces by fusing without substantial reshaping > Uniting glass lenses, e.g. forming bifocal lenses
No child classifications to compare. This is a leaf node in both IPC and CPC.