DIFF Subgroup
G10K 9/18 Details, e.g. bulbs, pumps, pistons, switches or casings
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers > Details, e.g. bulbs, pumps, pistons, switches or casings
CPC:
Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers (loudspeakers or like acoustic electromechanical transducers H04R) > Details, e.g. bulbs, pumps, pistons, switches or casings
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
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