CH241231A - Rechenhilfsgerät, insbesondere zum Addieren und Subtrahieren. - Google Patents

Rechenhilfsgerät, insbesondere zum Addieren und Subtrahieren.

Info

Publication number
CH241231A
CH241231A CH241231DA CH241231A CH 241231 A CH241231 A CH 241231A CH 241231D A CH241231D A CH 241231DA CH 241231 A CH241231 A CH 241231A
Authority
CH
Switzerland
Prior art keywords
subtracting
calculation aid
aid
calculation
Prior art date
Application number
Other languages
English (en)
Inventor
Fuerrer Eduard
Original Assignee
Fuerrer Eduard
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 Fuerrer Eduard filed Critical Fuerrer Eduard
Publication of CH241231A publication Critical patent/CH241231A/de

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06C—DIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C1/00—Computing aids in which the computing members form at least part of the displayed result and are manipulated directly by hand, e.g. abacuses or pocket adding devices
    • 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

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
CH241231D 1942-04-15 1942-04-15 Rechenhilfsgerät, insbesondere zum Addieren und Subtrahieren. CH241231A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH241231T 1942-04-15

Publications (1)

Publication Number Publication Date
CH241231A true CH241231A (de) 1946-02-28

Family

ID=4462223

Family Applications (1)

Application Number Title Priority Date Filing Date
CH241231D CH241231A (de) 1942-04-15 1942-04-15 Rechenhilfsgerät, insbesondere zum Addieren und Subtrahieren.

Country Status (1)

Country Link
CH (1) CH241231A (de)

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