DE58436C - - Google Patents
Info
- Publication number
- DE58436C DE58436C DENDAT58436D DE58436DA DE58436C DE 58436 C DE58436 C DE 58436C DE NDAT58436 D DENDAT58436 D DE NDAT58436D DE 58436D A DE58436D A DE 58436DA DE 58436 C DE58436 C DE 58436C
- Authority
- DE
- Germany
- Prior art keywords
- arms
- levers
- upright
- box
- lever
- 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.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 2
- 210000001747 pupil Anatomy 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 description 2
- 239000002184 metal 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
- G09B17/00—Teaching reading
Landscapes
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Sheet Holders (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE58436C true DE58436C (cs) |
Family
ID=332737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT58436D Expired - Lifetime DE58436C (cs) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE58436C (cs) |
-
0
- DE DENDAT58436D patent/DE58436C/de not_active Expired - Lifetime
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