US PATENT SUBCLASS 165 / FOR 120
.~.~ Heat pump with supplemental heat (165/29)

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

Internet Version by PATENTEC © 1999      Terms of Use


165 /   HD   HEAT EXCHANGE

FOR 104  DF  AUTOMATIC CONTROL (165/13) {2}
FOR 105  DF  .~ Heating and cooling (165/14) {14}
FOR 120.~.~ Heat pump with supplemental heat (165/29)

DEFINITION

Classification: 165/FOR.120

Foreign art collections in which the heating effect of a heat pump is augmented by a heat source under the control of a condition sensor.