Title:
Combined sign and burglar alarm signal
United States Patent 2518979
US Patent References:
Burglar alarm and protector
- - 1404295

Burglar alarm
- - 1408920

Signal
- - 1500706

/1700950.html
- - 1700950


Inventors:
Davidson, John R.
Publication Date:
08/15/1950
View Patent Images:
Download PDF 2518979 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Alexander W. L.
Primary Class:
340/815.690
Other Classes:
340/815.740, 340/815.920, 116/5, 40/580
International Classes:
G09F13/04; G09F23/00