US PATENT SUBCLASS 219 / 65
.~.~ Nonrotary electrode (e.g., oscillating)

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
59.1  DF  .~ Of cylinders (e.g., pipes and tubes) {14}
65.~.~ Nonrotary electrode (e.g., oscillating)

DEFINITION

Classification: 219/65

(under subclass 59.1) Subject matter having nonrotating electrodes.

(1) Note. The electrodes, for example, may oscillate to and from each other with the longitudinally split tube between them.