US PATENT SUBCLASS 219 / 121.51
.~.~.~.~ Gas supply system

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


219 /   HD   ELECTRIC HEATING

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
121.11  DF  .~ By arc {16}
121.36  DF  .~.~ Using plasma {8}
121.48  DF  .~.~.~ Plasma torch structure {5}
121.51.~.~.~.~ Gas supply system

DEFINITION

Classification: 219/121.51

Gas supply system:

(under subclass 121.48) Subject matter including structure for delivering working and shielding gases.