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US 2,428,089 A
Filed
: 05/30/1945
Issued
: 09/30/1947
Est. Priority Date
: 02/25/1943
Status: Expired due to Term
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15
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Current Assignee
Francis X. Bucher
,
Robert E. Mumma
Original Assignee
Francis X. Bucher
,
Robert E. Mumma
Inventors
Mumma, Robert E.
,
Bucher, Francis X.
Application Number
US02/596,751
Time in Patent Office
853 Days
Field of Search
US Class Current
379/364
CPC Class Codes
H04B 14/02
characterised by the use of...
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