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Doorbell and porch light control
US 3,017,623 A
Filed
: 03/12/1956
Issued
: 01/16/1962
Est. Priority Date
: 03/12/1956
Status: Expired due to Term
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Current Assignee
Carl J. Bishofberger
Original Assignee
Carl J. Bishofberger
Inventors
Bishofberger, Carl J.
Application Number
US03/571,056
Time in Patent Office
2,136 Days
Field of Search
US Class Current
340/322
CPC Class Codes
G08B 7/06
using electric transmission...
H01H 43/304
of two bodies expanding or ...
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