NL290452A - - Google Patents
Info
- Publication number
- NL290452A NL290452A NL290452DA NL290452A NL 290452 A NL290452 A NL 290452A NL 290452D A NL290452D A NL 290452DA NL 290452 A NL290452 A NL 290452A
- Authority
- NL
- Netherlands
Links
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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL290452A true NL290452A (en) |
Family
ID=1874800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL290452D NL290452A (en) |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL290452A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4233757A (en) * | 1978-09-05 | 1980-11-18 | Jacqualine Narcise | Mathematics device |
-
0
- NL NL290452D patent/NL290452A/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4233757A (en) * | 1978-09-05 | 1980-11-18 | Jacqualine Narcise | Mathematics device |
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