DE249607C - - Google Patents

Info

Publication number
DE249607C
DE249607C DENDAT249607D DE249607DA DE249607C DE 249607 C DE249607 C DE 249607C DE NDAT249607 D DENDAT249607 D DE NDAT249607D DE 249607D A DE249607D A DE 249607DA DE 249607 C DE249607 C DE 249607C
Authority
DE
Germany
Prior art keywords
bodies
receiving
box
arithmetic teaching
cavities
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.)
Active
Application number
DENDAT249607D
Other languages
German (de)
English (en)
Publication of DE249607C publication Critical patent/DE249607C/de
Active 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)
  • Ultra Sonic Daignosis Equipment (AREA)
DENDAT249607D Active DE249607C (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
DE249607C true DE249607C (enrdf_load_stackoverflow)

Family

ID=508211

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT249607D Active DE249607C (enrdf_load_stackoverflow)

Country Status (1)

Country Link
DE (1) DE249607C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE911948C (de) * 1952-07-15 1954-05-20 Karl Hofmann Rechenlehrmittelkasten fuer Schueler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE911948C (de) * 1952-07-15 1954-05-20 Karl Hofmann Rechenlehrmittelkasten fuer Schueler

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