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3027497
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Information
Patent Grant
3027497
References
Source
Patent Number
3,027,497
Date Filed
Not available
Date Issued
Tuesday, March 27, 1962
63 years ago
CPC
H01H47/20 - for producing frequency-selective operation of the relay
G08C23/02 - using infrasonic, sonic or ultrasonic waves
H01H51/32 - Frequency relays Mechanically-tuned relays
Y10T307/944 - Power circuit controlled
US Classifications
361 - Electricity: electrical systems and devices
307 - Electrical transmission or interconnection systems
335 - Electricity: magnetically operated switches, magnets, and electromagnets
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