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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47/00
Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
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H01H47/002
Monitoring or fail-safe circuits
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H01H2047/003
Detecting welded contacts and applying weld break pulses to coil
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