NL6604717A - - Google Patents
Info
- Publication number
- NL6604717A NL6604717A NL6604717A NL6604717A NL6604717A NL 6604717 A NL6604717 A NL 6604717A NL 6604717 A NL6604717 A NL 6604717A NL 6604717 A NL6604717 A NL 6604717A NL 6604717 A NL6604717 A NL 6604717A
- 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
- G09B3/00—Manually or mechanically operated teaching appliances working with questions and answers
- G09B3/02—Manually or mechanically operated teaching appliances working with questions and answers of the type wherein the student is expected to construct an answer to the question which is presented or wherein the machine gives an answer to the question presented by a student
- G09B3/04—Manually or mechanically operated teaching appliances working with questions and answers of the type wherein the student is expected to construct an answer to the question which is presented or wherein the machine gives an answer to the question presented by a student of chart form
-
- 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
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
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)
- Advancing Webs (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Replacement Of Web Rolls (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB61412U DE1924170U (de) | 1965-04-08 | 1965-04-08 | Antriebsvorrichtung fuer lehrgeraete. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6604717A true NL6604717A (US20030199744A1-20031023-C00003.png) | 1966-10-10 |
Family
ID=6973193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6604717A NL6604717A (US20030199744A1-20031023-C00003.png) | 1965-04-08 | 1966-04-07 |
Country Status (4)
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2705599A (en) * | 1950-04-29 | 1955-04-05 | Houston Fearless Corp | Reel clutch |
| US3153862A (en) * | 1961-12-05 | 1964-10-27 | Gary L Sawyer | Educational device |
-
1965
- 1965-04-08 DE DEB61412U patent/DE1924170U/de not_active Expired
-
1966
- 1966-03-10 US US535296A patent/US3307796A/en not_active Expired - Lifetime
- 1966-04-05 ES ES0325143A patent/ES325143A1/es not_active Expired
- 1966-04-07 NL NL6604717A patent/NL6604717A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US3307796A (en) | 1967-03-07 |
| DE1924170U (de) | 1965-09-23 |
| ES325143A1 (es) | 1967-02-16 |
