US PATENT SUBCLASS 392 / 459
.~.~.~.~ Clamped or secured to tank wall

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

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
441  DF  .~ Tank or container type liquid heater {4}
449  DF  .~.~ Line connected tank {4}
458  DF  .~.~.~ With external heater {3}
459.~.~.~.~ Clamped or secured to tank wall

DEFINITION

Classification: 392/459

Clamped or secured to tank wall:

(under subclass 458) Subject matter including a means to fasten or anchor the heating element to the tank wall.

SEE OR SEARCH CLASS

219, Electric Heating,

536, for heating unit mounting or attaching means and subclass 542 for resistive-element attaching, securing or electrical insulation means.