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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13/00
Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
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H01H13/70
having a plurality of operating members associated with different sets of contacts, e.g. keyboard
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H01H13/702
with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
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H01H13/704
characterised by the layers, e.g. by their material or structure
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