Apparatus for use in stethoscopy
United States Patent 3110770
US Patent References:
Program transmission
- - 1930898
Signaling system
- - 2117739
Public address stabilizing system
- - 2157178
High-definition television system and method
- - 2686831
Methods and apparatus for minimizing regenerative feedback
- - 2723316
Program transmission
- - 1930898
Signaling system
- - 2117739
Public address stabilizing system
- - 2157178
High-definition television system and method
- - 2686831
Methods and apparatus for minimizing regenerative feedback
- - 2723316
Inventors:
Derek, Howell
Publication Date:
11/12/1963
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Assignee:
FARADAY ELECTRONIC INSTR LTD
Primary Class:
Other Classes:
381/93, 600/586
International Classes:
A61B5/024; A61B7/04; A61B7/00
US Patent References:
| 2852671 | Method and apparatus for frequency division |