Title:
Portable door alarm
United States Patent 3261010
US Patent References:
/0635100.html
- - 0635100

/1146883.html
- - 1146883

Burglar alarm
- - 2259696

Burglar alarm
- - 2446217

Closure member operated switch
- - 2624792


Inventors:
Kardel, John V.
Publication Date:
07/12/1966
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Assignee:
Kardel, John V.
Primary Class:
340/546
Other Classes:
248/231.410, 200/61.810, 248/205.100
International Classes:
G08B13/08; G08B13/02
US Patent References:
2816280Portable fire alarm
2826656Alarm device
2866181Burglar alarm having both visual and audible alarm means
2943308Protective alarm system
3011163Burglar alarm
3056954Portable signal device
Foreign References:
GB681165A