Uniting glass lenses, e.g. forming bifocal lenses

Full Title

Re-forming shaped glass > Uniting glass pieces by fusing without substantial reshaping > Uniting glass lenses, e.g. forming bifocal lenses

Classification Context

Section:

CHEMISTRY; METALLURGY

Class:

GLASS; MINERAL OR SLAG WOOL

Subclass:

MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL

Related Keywords