CA476827A - Educational number-teaching devices - Google Patents

Educational number-teaching devices

Info

Publication number
CA476827A
CA476827A CA476827A CA476827DA CA476827A CA 476827 A CA476827 A CA 476827A CA 476827 A CA476827 A CA 476827A CA 476827D A CA476827D A CA 476827DA CA 476827 A CA476827 A CA 476827A
Authority
CA
Canada
Prior art keywords
educational
teaching devices
teaching
devices
educational number
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
CA476827A
Other languages
French (fr)
Inventor
Arthur Wetzstein Ralph
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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA476827A publication Critical patent/CA476827A/en
Expired legal-status Critical Current

Links

CA476827A Educational number-teaching devices Expired CA476827A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA476827T

Publications (1)

Publication Number Publication Date
CA476827A true CA476827A (en) 1951-09-11

Family

ID=35616457

Family Applications (1)

Application Number Title Priority Date Filing Date
CA476827A Expired CA476827A (en) Educational number-teaching devices

Country Status (1)

Country Link
CA (1) CA476827A (en)

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