Pulsing device
United States Patent 3119200
US Patent References:
Vibratory coil
- - 2009892

Magnetic sound generators
- - 2791765

Electric signal device
- - 2936450

Heartbeat mechanism
- - 2954642


Inventors:
Curtin, William J.
Paul, Carbery
Publication Date:
01/28/1964
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Assignee:
Curtin, William J.
Paul, Carbery
Primary Class:
446/192
Other Classes:
446/295
International Classes:
A63H3/00; A63H3/28