Hand microphone and switch
United States Patent 2485278
US Patent References:
/D132863.html
- - D132863

/0266277.html
- - 0266277

/0567794.html
- - 0567794

/0836202.html
- - 0836202

/1120049.html
- - 1120049


Inventors:
Gilman, Webster E.
Bierman, Raymond C.
Publication Date:
10/18/1949
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Assignee:
PERMOFLUX CORP
Primary Class:
381/111
Other Classes:
200/293.100, 181/242, D14/225, 381/355
International Classes:
H04M1/03; H04R1/08
US Patent References:
1930906Sound translating device
2059714Hand telephone
2100500Telephone unit
2142993Radio telephone equipment
2152915Telephone instrument
2267364Seal for circuit controlling devices
2360796Electroacoustic device
2390488Noise shield for acoustic devices
2410899Microphone handle
2421516Apparatus for supporting portable radio sets
2452830Combination microphone and control means for dictating machines