Title:
POLICE ALARM
United States Patent 3440635
US Patent References:
/0683692.html
- - 0683692

/1081884.html
- - 1081884

Phonetic burglar and other alarm
- - 1505326

Portable radioantenna
- - 1640929

Transmitter device
- - 1993436


Inventors:
Hull, Harris B.
Publication Date:
04/22/1969
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Assignee:
Harris, Hull B.
Primary Class:
340/539.130
Other Classes:
200/61.190, 455/701, 340/574, 340/825.490, 455/521, 340/7.500, 455/517, 455/100
International Classes:
G08B25/01; G08B27/00; G08B1/08; G08B13/02; H04B1/02
US Patent References:
2106658Alarm system
2135476Hold-up alarm
2608612Battery-operated sound signal
2766358Hold-up alarm signal system
3111656Automatic alarm system




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