DE145470C - - Google Patents
Info
- Publication number
- DE145470C DE145470C DENDAT145470D DE145470DA DE145470C DE 145470 C DE145470 C DE 145470C DE NDAT145470 D DENDAT145470 D DE NDAT145470D DE 145470D A DE145470D A DE 145470DA DE 145470 C DE145470 C DE 145470C
- Authority
- DE
- Germany
- Prior art keywords
- box
- hundreds
- numbers
- calculation box
- tens
- 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
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid 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)
- Assembled Shelves (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE145470C true DE145470C (cs) |
Family
ID=412809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT145470D Active DE145470C (cs) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE145470C (cs) |
-
0
- DE DENDAT145470D patent/DE145470C/de active Active
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