CA494668A - Dispositifs d'education - Google Patents

Dispositifs d'education

Info

Publication number
CA494668A
CA494668A CA494668A CA494668DA CA494668A CA 494668 A CA494668 A CA 494668A CA 494668 A CA494668 A CA 494668A CA 494668D A CA494668D A CA 494668DA CA 494668 A CA494668 A CA 494668A
Authority
CA
Canada
Prior art keywords
educational devices
educational
devices
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA494668A
Other languages
English (en)
Inventor
S. Adams Clyde
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Cash Register Co
Original Assignee
National Cash Register Co
Publication date
Application granted granted Critical
Publication of CA494668A publication Critical patent/CA494668A/fr
Expired legal-status Critical Current

Links

CA494668A Dispositifs d'education Expired CA494668A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA494668T

Publications (1)

Publication Number Publication Date
CA494668A true CA494668A (fr) 1953-07-21

Family

ID=35640069

Family Applications (1)

Application Number Title Priority Date Filing Date
CA494668A Expired CA494668A (fr) Dispositifs d'education

Country Status (1)

Country Link
CA (1) CA494668A (fr)

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