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PCE
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DIFF Subgroup
H05B 3/50

heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Ohmic-resistance heating > Heating elements having the shape of rods or tubes > non-flexible > heating conductor embedded in insulating material > heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins

CPC:

Ohmic-resistance heating > Heating elements having the shape of rods or tubes (H05B3/62, H05B3/68, H05B3/78 take precedence) > non-flexible > heating conductor embedded in insulating material > heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins

No child classifications to compare. This is a leaf node in both IPC and CPC.