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Pronunciary
US 3,020,360 A
Filed
: 01/29/1959
Issued
: 02/06/1962
Est. Priority Date
: 01/29/1959
Status: Expired due to Term
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25
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Current Assignee
Joseph W. Gratian
,
Richard John O'Brien
Original Assignee
Joseph W. Gratian
,
Richard John O'Brien
Inventors
Gratian, Joseph W.
,
O'brien, Richard J.
Application Number
US03/789,918
Time in Patent Office
1,104 Days
Field of Search
US Class Current
360/1
CPC Class Codes
G09B 5/062
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