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3258564
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Information
Patent Grant
3258564
References
Source
Patent Number
3,258,564
Date Filed
Not available
Date Issued
Tuesday, June 28, 1966
58 years ago
CPC
A47G29/1225 - Signalling devices
A47G2029/1226 - comprising electrical parts
A47G2029/1228 - activated by the weight of the letter
US Classifications
337 - Electricity: electrothermally or thermally actuated switches
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