Alarm device
United States Patent 1582745

Inventors:
Heinrich, Geffcken Rudolf Herma
Hans, Richter Rudolf
Publication Date:
04/27/1926
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Assignee:
Heinrich, Geffcken Rudolf Herma
Hans, Richter Rudolf
Primary Class:
340/541
Other Classes:
315/306, 315/326, 340/650
International Classes:
G08B23/00