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Telegraph communication systems with carrier monitoring
US 2,967,908 A
Filed
: 04/28/1959
Issued
: 01/10/1961
Est. Priority Date
: 04/28/1959
Status: Expired due to Term
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5 Citations
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Current Assignee
George Q. Mccoll
,
Richard E. Gray
Original Assignee
George Q. Mccoll
,
Richard E. Gray
Inventors
Gray, Richard E.
,
Mccoll, George Q.
Application Number
US03/809,376
Time in Patent Office
623 Days
Field of Search
US Class Current
178/69.00R
CPC Class Codes
H04L 1/206
for modulated signals
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