FR742742A - - Google Patents
Info
- Publication number
- FR742742A FR742742A FR742742DA FR742742A FR 742742 A FR742742 A FR 742742A FR 742742D A FR742742D A FR 742742DA FR 742742 A FR742742 A FR 742742A
- Authority
- FR
- France
- 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.)
- Expired
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
- G09B5/00—Electrically-operated educational appliances
- G09B5/04—Electrically-operated educational appliances with audible presentation of the material to be studied
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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR742742A true FR742742A (ru) | 1933-03-14 |
Family
ID=1547106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR742742D Expired FR742742A (ru) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR742742A (ru) |
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0
- FR FR742742D patent/FR742742A/fr not_active Expired