DE238782C - - Google Patents
Info
- Publication number
- DE238782C DE238782C DENDAT238782D DE238782DA DE238782C DE 238782 C DE238782 C DE 238782C DE NDAT238782 D DENDAT238782 D DE NDAT238782D DE 238782D A DE238782D A DE 238782DA DE 238782 C DE238782 C DE 238782C
- Authority
- DE
- Germany
- Prior art keywords
- balls
- wire
- storage space
- pendulum
- sliding
- 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
- 230000002441 reversible effect Effects 0.000 claims 2
- 241000121237 Nitrospirae Species 0.000 claims 1
- 239000003086 colorant Substances 0.000 claims 1
- 230000004069 differentiation Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 238000005562 fading Methods 0.000 claims 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims 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)
- Pinball Game Machines (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE238782C true DE238782C (cs) |
Family
ID=498273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT238782D Active DE238782C (cs) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE238782C (cs) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2527080A (en) * | 1948-02-09 | 1950-10-24 | Ralph E Rickard | Abacus |
| US2646631A (en) * | 1947-01-22 | 1953-07-28 | Lazar Nathan | Combined abacus and counting rack |
-
0
- DE DENDAT238782D patent/DE238782C/de active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2646631A (en) * | 1947-01-22 | 1953-07-28 | Lazar Nathan | Combined abacus and counting rack |
| US2527080A (en) * | 1948-02-09 | 1950-10-24 | Ralph E Rickard | Abacus |
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