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_html_response) |
Family
ID=422342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT155913D Active DE155913C (enrdf_load_html_response) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE155913C (enrdf_load_html_response) |
-
0
- DE DENDAT155913D patent/DE155913C/de active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2654164A (en) | Abacus | |
| DE155913C (enrdf_load_html_response) | ||
| DE102013005224B4 (de) | Zahlen-Lehrmittel | |
| CH118993A (de) | Geduldspiel. | |
| DE265451C (enrdf_load_html_response) | ||
| DE25443C (de) | Rechenapparat für Schulen | |
| DE345946C (enrdf_load_html_response) | ||
| AT24738B (de) | Kontrollkasse. | |
| DE39980C (de) | Rechenmaschine für den Unterricht | |
| DE433265C (de) | Kreuzraetselgeraet | |
| DE507698C (de) | Lehrvorrichtung fuer den Lese- und Schreibunterricht | |
| DE44438C (de) | Rechenlehrmittel | |
| AT166194B (enrdf_load_html_response) | ||
| DE582700C (de) | Knopf mit Drahtbuegel und Gegenknopf | |
| DE448395C (de) | Rechenlehrmittel | |
| DE363392C (de) | Rechenmaschine | |
| DE575041C (de) | Bohrerstaender | |
| DE20741C (de) | Lehrmittelapparat für den Anschauungsunterricht | |
| DE440260C (de) | Schulrechenmaschine | |
| DE56630C (de) | Bruchrechenmaschine für Lehrzwecke | |
| DE259798C (enrdf_load_html_response) | ||
| DE383592C (de) | Lehrmittel zum Rechnen | |
| DE483558C (de) | Sortiervorrichtung, insbesondere fuer Daerme | |
| DE483096C (de) | Pflanzlochstecher mit mehreren Querreihen | |
| DE131337C (enrdf_load_html_response) |