DE155913C - - Google Patents
Info
- Publication number
- DE155913C DE155913C DENDAT155913D DE155913DA DE155913C DE 155913 C DE155913 C DE 155913C DE NDAT155913 D DENDAT155913 D DE NDAT155913D DE 155913D A DE155913D A DE 155913DA DE 155913 C DE155913 C DE 155913C
- Authority
- DE
- Germany
- Prior art keywords
- figures
- key
- keys
- lever
- numbers
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007177 brain activity Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 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)
- Moulds For Moulding Plastics Or The Like (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE155913C true DE155913C (enrdf_load_stackoverflow) |
Family
ID=422342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT155913D Active DE155913C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE155913C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT155913D patent/DE155913C/de active Active
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