Rotary siren
United States Patent 2616956
US Patent References:
/1213732.html
- - 1213732
Signaling device
- - 1952351
Siren for the production of sharp cut tones of short duration
- - 1985954
/1213732.html
- - 1213732
Signaling device
- - 1952351
Siren for the production of sharp cut tones of short duration
- - 1985954
Inventors:
Stuart, Russell Ernest
Publication Date:
11/04/1952
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Export Citation:
Assignee:
Stuart, Russell Ernest
Primary Class:
Other Classes:
340/404.300, 116/147
International Classes:
G10K7/04; G10K7/00
Foreign References:
| FR560283A |