DIFF Main Group
F16J 3/00 Diaphragms; Bellows; Bellows pistons (connection of valves to inflatable elastic bodies B60C29/00; bellows or the like used in instruments G12B1/04; diaphragms for electromechanical transducers H04R7/00)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Diaphragms; Bellows; Bellows pistons
CPC: Diaphragms; Bellows; Bellows pistons (connection of valves to inflatable elastic bodies B60C29/00; bellows or the like used in instruments G12B1/04; diaphragms for electromechanical transducers H04R7/00)
Full Title
Full titles differ between systems:
IPC:
Diaphragms; Bellows; Bellows pistons
CPC:
Diaphragms; Bellows; Bellows pistons (connection of valves to inflatable elastic bodies B60C29/00; bellows or the like used in instruments G12B1/04; diaphragms for electromechanical transducers H04R7/00)
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
IPC defines codes here since 1974.
Child Classifications
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