Title:
Variable focus transducer
United States Patent 3090030
US Patent References:
Electrical compensator
- - 1971688

Apparatus for submarine signaling
- - 2407271

Apparatus for submarine signaling
- - 2407329

Piezoelectric crystal holder
- - 2458288

Transducer
- - 2748369


Inventors:
Hugo, Schuck Oscar
Publication Date:
05/14/1963
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Assignee:
HONEYWELL REGULATOR CO
Primary Class:
367/103
Other Classes:
367/123, 367/164, 367/138, 367/903, 73/625
International Classes:
A61B8/00; G10K11/34; G10K11/00
US Patent References:
2852772Receiver scanning system
3012244Receiver scanning system
3037185Sonar apparatus and components