FR442530A - Abacus-counter for teaching numbers, numbers and arithmetic - Google Patents

Abacus-counter for teaching numbers, numbers and arithmetic

Info

Publication number
FR442530A
FR442530A FR442530DA FR442530A FR 442530 A FR442530 A FR 442530A FR 442530D A FR442530D A FR 442530DA FR 442530 A FR442530 A FR 442530A
Authority
FR
France
Prior art keywords
numbers
abacus
arithmetic
counter
teaching
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
Other languages
French (fr)
Inventor
Charles Willemin
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of FR442530A publication Critical patent/FR442530A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B19/00—Teaching not covered by other main groups of this subclass
    • G09B19/02—Counting; Calculating

Landscapes

  • Business, Economics & Management (AREA)
  • Engineering & Computer Science (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Physics & Mathematics (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
FR442530D 1912-04-13 1912-04-13 Abacus-counter for teaching numbers, numbers and arithmetic Expired FR442530A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR442530T 1912-04-13

Publications (1)

Publication Number Publication Date
FR442530A true FR442530A (en) 1912-09-03

Family

ID=1483689

Family Applications (1)

Application Number Title Priority Date Filing Date
FR442530D Expired FR442530A (en) 1912-04-13 1912-04-13 Abacus-counter for teaching numbers, numbers and arithmetic

Country Status (1)

Country Link
FR (1) FR442530A (en)

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