US PATENT SUBCLASS 392 / 490
.~.~.~ Plural heated line sections (e.g., series or parallel, etc.)

Current as of: June, 1999
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392 /   HD   ELECTRIC RESISTANCE HEATING DEVICES

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
465  DF  .~ Continuous flow type fluid heater {12}
485  DF  .~.~ Heated line section with heating element internal of flow path {6}
490.~.~.~ Plural heated line sections (e.g., series or parallel, etc.)

DEFINITION

Classification: 392/490

Plural heated line sections (e.g., series or parallel, etc.):

(under subclass 485) Subject matter including two or more separate heated line sections in series or parallel arrangement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

486, for plural pipes or tubes forming flow path.