DIFF Subgroup
H05B 3/40 Heating elements having the shape of rods or tubes (H05B3/62, H05B3/68, H05B3/78 take precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Heating elements having the shape of rods or tubes
CPC: Heating elements having the shape of rods or tubes (H05B3/62, H05B3/68, H05B3/78 take precedence)
Full Title
Full titles differ between systems:
IPC:
Ohmic-resistance heating > Heating elements having the shape of rods or tubes
CPC:
Ohmic-resistance heating > Heating elements having the shape of rods or tubes (H05B3/62, H05B3/68, H05B3/78 take precedence)
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
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