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Testing and training device for teaching reading and writing
US 2,723,465 A
Filed
: 05/28/1951
Issued
: 11/15/1955
Est. Priority Date
: 05/28/1951
Status: Expired due to Term
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Current Assignee
Esther Silverstein
Original Assignee
Esther Silverstein
Inventors
Silverstein, Esther
Application Number
US03/228,668
Time in Patent Office
1,632 Days
Field of Search
US Class Current
434/159
CPC Class Codes
G09B 1/00
Manually or mechanically op...
G09B 1/06
and being attachable to, or...
G09B 1/32
comprising elements to be u...
G09B 17/00
Teaching reading teaching l...
G09B 19/02
Counting; Calculating abacu...
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