DE177931C - - Google Patents
Info
- Publication number
- DE177931C DE177931C DENDAT177931D DE177931DA DE177931C DE 177931 C DE177931 C DE 177931C DE NDAT177931 D DENDAT177931 D DE NDAT177931D DE 177931D A DE177931D A DE 177931DA DE 177931 C DE177931 C DE 177931C
- Authority
- DE
- Germany
- Prior art keywords
- odd
- summands
- tasks
- slider
- images
- 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
Links
- 241000587161 Gomphocarpus Species 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
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)
- Toys (AREA)
- Displays For Variable Information Using Movable Means (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE177931C true DE177931C (OSRAM) |
Family
ID=442368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT177931D Active DE177931C (OSRAM) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE177931C (OSRAM) |
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0
- DE DENDAT177931D patent/DE177931C/de active Active
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