NL6717885A - - Google Patents
Info
- Publication number
- NL6717885A NL6717885A NL6717885A NL6717885A NL6717885A NL 6717885 A NL6717885 A NL 6717885A NL 6717885 A NL6717885 A NL 6717885A NL 6717885 A NL6717885 A NL 6717885A NL 6717885 A NL6717885 A NL 6717885A
- 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
-
- 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
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/02—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Algebra (AREA)
- Entrepreneurship & Innovation (AREA)
- Calculators And Similar Devices (AREA)
- Electrically Operated Instructional Devices (AREA)
- Structure Of Printed Boards (AREA)
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6717885A NL6717885A (enExample) | 1967-12-29 | 1967-12-29 | |
| GB1231080D GB1231080A (enExample) | 1967-12-29 | 1968-12-19 | |
| DE19681816375 DE1816375A1 (de) | 1967-12-29 | 1968-12-21 | Mathematisches Lehrgeraet |
| US786949A US3555703A (en) | 1967-12-29 | 1968-12-26 | Equipment for teaching mathematics |
| FR1599992D FR1599992A (enExample) | 1967-12-29 | 1968-12-27 | |
| ES361981A ES361981A1 (es) | 1967-12-29 | 1968-12-28 | Aparato para realizar calculos aritmeticos, en especial, para la ensenanza de las matematicas. |
| CH1941768A CH531766A (fr) | 1967-12-29 | 1968-12-28 | Dispositif pour l'enseignement des mathématiques dans un système décimal-binaire |
| BE726216D BE726216A (enExample) | 1967-12-29 | 1968-12-30 | |
| SE17926/68A SE349172B (enExample) | 1967-12-29 | 1968-12-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6717885A NL6717885A (enExample) | 1967-12-29 | 1967-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6717885A true NL6717885A (enExample) | 1969-07-01 |
Family
ID=19802141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6717885A NL6717885A (enExample) | 1967-12-29 | 1967-12-29 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3555703A (enExample) |
| BE (1) | BE726216A (enExample) |
| CH (1) | CH531766A (enExample) |
| DE (1) | DE1816375A1 (enExample) |
| ES (1) | ES361981A1 (enExample) |
| FR (1) | FR1599992A (enExample) |
| GB (1) | GB1231080A (enExample) |
| NL (1) | NL6717885A (enExample) |
| SE (1) | SE349172B (enExample) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4132015A (en) * | 1977-04-14 | 1979-01-02 | Lonnie Machen | Teaching-learning aid for numeration systems and basic computer concepts |
| DE3303695C1 (de) * | 1983-02-03 | 1984-08-02 | Haase, Peter, 3508 Melsungen | Vorrichtung zur Darstellung des Zahlenaufbaus und der Maechtigkeit von Mengen |
| US20220277665A1 (en) * | 2021-03-01 | 2022-09-01 | Dwight Morton | Manipulative for modeling operations with fractions |
-
1967
- 1967-12-29 NL NL6717885A patent/NL6717885A/xx unknown
-
1968
- 1968-12-19 GB GB1231080D patent/GB1231080A/en not_active Expired
- 1968-12-21 DE DE19681816375 patent/DE1816375A1/de active Pending
- 1968-12-26 US US786949A patent/US3555703A/en not_active Expired - Lifetime
- 1968-12-27 FR FR1599992D patent/FR1599992A/fr not_active Expired
- 1968-12-28 ES ES361981A patent/ES361981A1/es not_active Expired
- 1968-12-28 CH CH1941768A patent/CH531766A/fr not_active IP Right Cessation
- 1968-12-30 SE SE17926/68A patent/SE349172B/xx unknown
- 1968-12-30 BE BE726216D patent/BE726216A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1231080A (enExample) | 1971-05-05 |
| FR1599992A (enExample) | 1970-07-20 |
| ES361981A1 (es) | 1970-12-16 |
| CH531766A (fr) | 1972-12-15 |
| BE726216A (enExample) | 1969-06-30 |
| DE1816375A1 (de) | 1969-09-18 |
| SE349172B (enExample) | 1972-09-18 |
| US3555703A (en) | 1971-01-19 |