Alarm device for indicating lack of motion
United States Patent 3163856
US Patent References:
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Inventors:
Kirby, Frederick G.
Publication Date:
12/29/1964
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Assignee:
Kirby, Frederick G.
Primary Class:
340/526
Other Classes:
600/595, 340/539.100, 128/903, 200/61.45R, 455/100, 340/539.120, 340/573.100
International Classes:
G08B21/04; H01H35/00; G08B21/00
US Patent References:
2875430Alarm apparatus for motor vehicle operator
3056951Safe alarm system
3082414Sleep inhibiting device and method
Foreign References:
GB810730A