Electric Time-Alarm and Annunciator
Description:
Patent for "a combined call and annunciator system by which any number of signals can be sent automatically or manually and various signals received through the annunciator, the apparatus serving to send signals to or from any number of distant points on the circuit at any time" (lines 17-23).
Date:
April 4, 1890
Creator:
Suren, Nathan H.
Item Type:
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Patent
Partner:
UNT Libraries Government Documents Department