Horn-type transducer
United States Patent 2942071
US Patent References:
Sound translating device
- - 1917012
Acoustic device
- - 1918164
Acoustic device
- - 1962374
Electrodynamic loud-speaker
- - 2490227
Loud-speaker with expanding horn unit
- - 2568883
Sound translating device
- - 1917012
Acoustic device
- - 1918164
Acoustic device
- - 1962374
Electrodynamic loud-speaker
- - 2490227
Loud-speaker with expanding horn unit
- - 2568883
Inventors:
Witchey, Albert L.
Publication Date:
06/21/1960
View Patent Images:
Export Citation:
Assignee:
RCA CORP
Primary Class:
Other Classes:
181/171, 181/159, 381/404
International Classes:
H04R1/30; H04R1/22
Foreign References:
| GB490750A | ||||
| GB495784A | ||||
| GB560219A | ||||
| IT406939B |