CPC Subgroup
F16J 3/04 Bellows
Full Title
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) > Bellows
3 direct subcodes
Child Classifications
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