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2190649
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Information
Patent Grant
2190649
References
Source
Patent Number
2,190,649
Date Filed
Not available
Date Issued
Tuesday, February 20, 1940
84 years ago
CPC
G09C3/06 - the connections being mechanical
G09C3/08 - the connections being electrical
H01F7/1805 - Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
US Classifications
380 - Cryptography
400 - Typewriting machines
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