DE237323C - - Google Patents

Info

Publication number
DE237323C
DE237323C DENDAT237323D DE237323DA DE237323C DE 237323 C DE237323 C DE 237323C DE NDAT237323 D DENDAT237323 D DE NDAT237323D DE 237323D A DE237323D A DE 237323DA DE 237323 C DE237323 C DE 237323C
Authority
DE
Germany
Prior art keywords
arithmetic
scale
buttons
pushed
individual
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
DENDAT237323D
Other languages
German (de)
English (en)
Publication of DE237323C publication Critical patent/DE237323C/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)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
DENDAT237323D Active DE237323C (en:Method)

Publications (1)

Publication Number Publication Date
DE237323C true DE237323C (en:Method)

Family

ID=496940

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT237323D Active DE237323C (en:Method)

Country Status (1)

Country Link
DE (1) DE237323C (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600084A (en) * 1947-03-08 1952-06-10 Svensson Sven Hjalmar Instructional device for calculating

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600084A (en) * 1947-03-08 1952-06-10 Svensson Sven Hjalmar Instructional device for calculating

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