Automatic recording apparatus
United States Patent 2557031
US Patent References:
/1229142.html
- - 1229142

/1321195.html
- - 1321195

Sound-recording apparatus
- - 1772990

Sound reproducing system
- - 1811841

Announcing apparatus
- - 1921742


Inventors:
Hrant, Isbenjian
Publication Date:
06/12/1951
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Assignee:
Hrant, Isbenjian
Primary Class:
369/4
Other Classes:
369/30.020, 369/19
International Classes:
G11B27/024; G11B27/022
US Patent References:
1936886Method of studio technique
1937919Recorded accompaniment for musical compositions
2038976Sound record
2125706Phonograph
2243090Sound record