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Title:
Door bell actuated light
United States Patent 2912685


Inventors:
Thomas, Beuford W.
Application Number:
US63230157A
Publication Date:
11/10/1959
Filing Date:
01/03/1957
Export Citation:
Click for automatic bibliography generation
Assignee:
Clarence, Hurt L.
Primary Class:
340/815.71
Other Classes:
307/157, 315/360, 340/326, 340/815.74, 361/195
International Classes:
G08B7/06
View Patent Images:
Download PDF 2912685  
US Patent References:
2637801Door lock and light control switch arrangement1953-05-05
2530749Control device with impulse drive1950-11-21
2288458Cycle timer control apparatus for traffic signals1942-06-30
2213100Call or warning system1940-08-27
Foreign References:
FR982930A1951-06-18




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