DE238782C - - Google Patents

Info

Publication number
DE238782C
DE238782C DENDAT238782D DE238782DA DE238782C DE 238782 C DE238782 C DE 238782C DE NDAT238782 D DENDAT238782 D DE NDAT238782D DE 238782D A DE238782D A DE 238782DA DE 238782 C DE238782 C DE 238782C
Authority
DE
Germany
Prior art keywords
balls
wire
storage space
pendulum
sliding
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
DENDAT238782D
Other languages
German (de)
English (en)
Publication of DE238782C publication Critical patent/DE238782C/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)
  • Pinball Game Machines (AREA)
DENDAT238782D Active DE238782C (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
DE238782C true DE238782C (enrdf_load_stackoverflow)

Family

ID=498273

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT238782D Active DE238782C (enrdf_load_stackoverflow)

Country Status (1)

Country Link
DE (1) DE238782C (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2527080A (en) * 1948-02-09 1950-10-24 Ralph E Rickard Abacus
US2646631A (en) * 1947-01-22 1953-07-28 Lazar Nathan Combined abacus and counting rack

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646631A (en) * 1947-01-22 1953-07-28 Lazar Nathan Combined abacus and counting rack
US2527080A (en) * 1948-02-09 1950-10-24 Ralph E Rickard Abacus

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