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TELEPHONE HEADSET WITH ADJUSTABLE SPEECH TUBE
US 3,440,365 A
Filed
: 11/04/1965
Issued
: 04/22/1969
Est. Priority Date
: 11/04/1965
Status: Expired due to Term
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Current Assignee
Herbert W. Bryant
,
Lionel W. Mosing
,
Norman C. Hazell
Original Assignee
Herbert W. Bryant
,
Lionel W. Mosing
,
Norman C. Hazell
Inventors
Bryant, Herbert W.
,
Hazell, Norman C.
,
Mosing, Lionel W.
Application Number
US04/506,310
Time in Patent Office
1,265 Days
Field of Search
US Class Current
379/430
CPC Class Codes
H04M 1/05
specially adapted for use o...
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