DE87807C - - Google Patents
Info
- Publication number
- DE87807C DE87807C DENDAT87807D DE87807DA DE87807C DE 87807 C DE87807 C DE 87807C DE NDAT87807 D DENDAT87807 D DE NDAT87807D DE 87807D A DE87807D A DE 87807DA DE 87807 C DE87807 C DE 87807C
- Authority
- DE
- Germany
- Prior art keywords
- balls
- row
- counting board
- frame
- ball
- 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
- 230000001174 ascending effect Effects 0.000 claims description 6
- 239000003086 colorant Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 235000012736 patent blue V Nutrition 0.000 description 1
- 230000000007 visual effect Effects 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)
- Indication In Cameras, And Counting Of Exposures (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE87807C true DE87807C (https=) |
Family
ID=359752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT87807D Active DE87807C (https=) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE87807C (https=) |
-
0
- DE DENDAT87807D patent/DE87807C/de active Active
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