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COMMUNICATION RESPONSE UNIT
US 3,541,257 A
Filed
: 11/27/1968
Issued
: 11/17/1970
Est. Priority Date
: 11/27/1968
Status: Expired due to Term
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14
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Current Assignee
Edward D. Mccormick
,
Frederick A. Hottes
,
Hubert K. Burke
Original Assignee
Edward D. Mccormick
,
Frederick A. Hottes
,
Hubert K. Burke
Inventors
Mccormick, Edward D.
,
Burke, Hubert K.
,
Hottes, Frederick A.
Application Number
US04/779,488
Time in Patent Office
720 Days
Field of Search
US Class Current
340/12.1
CPC Class Codes
H04Q 9/14
Calling by using pulses
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