FR370489A - Boulier-tableau noir - Google Patents

Boulier-tableau noir

Info

Publication number
FR370489A
FR370489A FR370489DA FR370489A FR 370489 A FR370489 A FR 370489A FR 370489D A FR370489D A FR 370489DA FR 370489 A FR370489 A FR 370489A
Authority
FR
France
Prior art keywords
abacus
blackboard
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
English (en)
Inventor
Franz Rieck
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 FR370489A publication Critical patent/FR370489A/fr
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)
FR370489D 1906-06-15 1906-10-15 Boulier-tableau noir Expired FR370489A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE370489X 1906-06-15

Publications (1)

Publication Number Publication Date
FR370489A true FR370489A (fr) 1907-02-07

Family

ID=1417411

Family Applications (1)

Application Number Title Priority Date Filing Date
FR370489D Expired FR370489A (fr) 1906-06-15 1906-10-15 Boulier-tableau noir

Country Status (1)

Country Link
FR (1) FR370489A (fr)

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