DE226164C - - Google Patents
Info
- Publication number
- DE226164C DE226164C DENDAT226164D DE226164DA DE226164C DE 226164 C DE226164 C DE 226164C DE NDAT226164 D DENDAT226164 D DE NDAT226164D DE 226164D A DE226164D A DE 226164DA DE 226164 C DE226164 C DE 226164C
- Authority
- DE
- Germany
- Prior art keywords
- boards
- board
- dots
- spots
- vertical
- 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
- 210000001747 pupil Anatomy 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)
- Electrically Operated Instructional Devices (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE226164C true DE226164C (cs) |
Family
ID=486738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT226164D Active DE226164C (cs) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE226164C (cs) |
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0
- DE DENDAT226164D patent/DE226164C/de active Active
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