US PATENT SUBCLASS 219 / 121.54
.~.~.~ Control systems

Current as of: June, 1999
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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}
121.54.~.~.~ Control systems {3}
121.55  DF  .~.~.~.~> Gas supply
121.56  DF  .~.~.~.~> Arc positioning
121.57  DF  .~.~.~.~> Arc ignition

DEFINITION

Classification: 219/121.54

Control systems:

(under subclass 121.36) Subject matter including a system to regulate the associated components of a plasma system.