US PATENT SUBCLASS 431 / 32
.~ Of cleaning means

Current as of: June, 1999
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431 /   HD   COMBUSTION

18  DF  TIMER, PROGRAMMER, RETARDER OR CONDITION RESPONSIVE CONTROL {26}
32.~ Of cleaning means

DEFINITION

Classification: 431/32

(under subclass 18) Apparatus in which the control or actuation is of structure dislodging extraneous matter or incrustations from burner elements.