by blowing, e.g. for making electric bulbs

Full Title

Re-forming shaped glass > Re-forming tubes or rods > by blowing, e.g. for making electric bulbs

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