Title:
Variable volume horn system
United States Patent 3173136
US Patent References:
Method of and apparatus for the generation of sounds
- - 1661058
Oscillation generator
- - 2165509
Transistor horn
- - 2910689
Device for detecting and repeating selectively sound signals emitted by overtaking vehicles
- - 2963693
Sound actuated detection and alarm system
- - 3049699
Method of and apparatus for the generation of sounds
- - 1661058
Oscillation generator
- - 2165509
Transistor horn
- - 2910689
Device for detecting and repeating selectively sound signals emitted by overtaking vehicles
- - 2963693
Sound actuated detection and alarm system
- - 3049699
Inventors:
Atkinson, Duane E.
Publication Date:
03/09/1965
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Assignee:
Atkinson, Duane E.
Primary Class:
Other Classes:
331/47
International Classes:
G08B3/00; G08B3/10
Foreign References:
| FR1091421A |