Patent classifications
H
ELECTRICITY
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H01
ELECTRIC ELEMENTS
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H01H
ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
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19/00
Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
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H01H19/10
Movable parts; Contacts mounted thereon
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H01H19/14
Operating parts, e.g. turn knob
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H01H2019/143
having at least two concentric turn knobs
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