LU57431A1 - - Google Patents
Info
- Publication number
- LU57431A1 LU57431A1 LU57431DA LU57431A1 LU 57431 A1 LU57431 A1 LU 57431A1 LU 57431D A LU57431D A LU 57431DA LU 57431 A1 LU57431 A1 LU 57431A1
- Authority
- LU
- Luxembourg
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
- G09B3/00—Manually or mechanically operated teaching appliances working with questions and answers
- G09B3/06—Manually or mechanically operated teaching appliances working with questions and answers of the multiple-choice answer type, i.e. where a given question is provided with a series of answers and a choice has to be made
- G09B3/08—Manually or mechanically operated teaching appliances working with questions and answers of the multiple-choice answer type, i.e. where a given question is provided with a series of answers and a choice has to be made of chart form
Landscapes
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electrically Operated Instructional Devices (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR138246 | 1968-02-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU57431A1 true LU57431A1 (xx) | 1969-07-31 |
Family
ID=8645400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU57431D LU57431A1 (xx) | 1968-02-01 | 1968-12-02 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3579875A (xx) |
| BE (1) | BE724835A (xx) |
| BR (1) | BR6805195D0 (xx) |
| CH (1) | CH507564A (xx) |
| DE (1) | DE1817404C3 (xx) |
| FR (1) | FR1583415A (xx) |
| GB (1) | GB1242610A (xx) |
| LU (1) | LU57431A1 (xx) |
| OA (1) | OA02946A (xx) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3707051A (en) * | 1971-02-22 | 1972-12-26 | S And R Associates Inc | Racing rules correlator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US667397A (en) * | 1900-02-12 | 1901-02-05 | Frederick D Jones | Educational appliance and number-wheel. |
| US1270668A (en) * | 1917-05-07 | 1918-06-25 | Cora J Spoor | Educational device. |
| US1346929A (en) * | 1919-05-26 | 1920-07-20 | Zion Isidor | Educational device |
-
1968
- 1968-02-01 FR FR138246A patent/FR1583415A/fr not_active Expired
- 1968-12-02 LU LU57431D patent/LU57431A1/xx unknown
- 1968-12-03 BE BE724835D patent/BE724835A/xx unknown
- 1968-12-03 OA OA53441A patent/OA02946A/xx unknown
- 1968-12-05 CH CH1819168A patent/CH507564A/fr not_active IP Right Cessation
- 1968-12-18 GB GB60231/68A patent/GB1242610A/en not_active Expired
- 1968-12-20 US US785709A patent/US3579875A/en not_active Expired - Lifetime
- 1968-12-27 BR BR205195/68A patent/BR6805195D0/pt unknown
- 1968-12-30 DE DE1817404A patent/DE1817404C3/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE724835A (xx) | 1969-06-03 |
| DE1817404B2 (de) | 1974-11-14 |
| OA02946A (fr) | 1970-12-15 |
| US3579875A (en) | 1971-05-25 |
| DE1817404C3 (de) | 1975-07-10 |
| DE1817404A1 (de) | 1969-08-14 |
| CH507564A (fr) | 1971-05-15 |
| GB1242610A (en) | 1971-08-11 |
| FR1583415A (xx) | 1969-10-31 |
| BR6805195D0 (pt) | 1973-04-26 |