Title:
Safety headpiece loudspeaker
United States Patent 3258534
US Patent References:
Helmet mounted loud-speaker
- - 2497871
Headband for hearing aid transducers
- - 2652457
Combination of head-band and adjustable microphone cage
- - 2993962
Helmet mounted loud-speaker
- - 2497871
Headband for hearing aid transducers
- - 2652457
Combination of head-band and adjustable microphone cage
- - 2993962
Inventors:
Goldsworthy, Forrest C.
Publication Date:
06/28/1966
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Export Citation:
Assignee:
Goldsworthy, Forrest C.
Primary Class:
Other Classes:
2/422, D29/103
International Classes:
A42B3/30; H04R1/10; A42B3/04
Foreign References:
| IT445537B |