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MAN TO MACHINE COMMUNICATION KEYBOARD DEVICE
US 3,428,747 A
Filed
: 03/22/1965
Issued
: 02/18/1969
Est. Priority Date
: 03/22/1965
Status: Expired due to Term
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Current Assignee
Alferieff Nicholas
Original Assignee
Alferieff Nicholas
Inventors
ALFERIEFF NICHOLAS
Application Number
US04/441,704
Time in Patent Office
1,429 Days
Field of Search
US Class Current
178/17.00R
CPC Class Codes
B41J 5/08
Character or syllable selec...
B41J 5/28
Multiple-action keys, e.g. ...
G06F 3/0235
using chord techniques G06F...
H01H 13/84
characterised by ergonomic ...
H03M 11/02
Details
H03M 11/08
by operating selected combi...
H03M 11/22
Static coding H03M11/26 tak...
H04L 17/02
Apparatus or circuits at th...
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