DE29722804U1 - Prüfvorrichtung - Google Patents
PrüfvorrichtungInfo
- Publication number
- DE29722804U1 DE29722804U1 DE29722804U DE29722804U DE29722804U1 DE 29722804 U1 DE29722804 U1 DE 29722804U1 DE 29722804 U DE29722804 U DE 29722804U DE 29722804 U DE29722804 U DE 29722804U DE 29722804 U1 DE29722804 U1 DE 29722804U1
- Authority
- DE
- Germany
- Prior art keywords
- tester
- Prior art date
- 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 - Lifetime
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
-
- 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
- G09B1/00—Manually or mechanically operated educational appliances using elements forming, or bearing, symbols, signs, pictures, or the like which are arranged or adapted to be arranged in one or more particular ways
- G09B1/32—Manually or mechanically operated educational appliances using elements forming, or bearing, symbols, signs, pictures, or the like which are arranged or adapted to be arranged in one or more particular ways comprising elements to be used without a special support
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)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29722804U DE29722804U1 (de) | 1997-12-23 | 1997-12-23 | Prüfvorrichtung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29722804U DE29722804U1 (de) | 1997-12-23 | 1997-12-23 | Prüfvorrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
DE29722804U1 true DE29722804U1 (de) | 1998-03-05 |
Family
ID=8050467
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE29722804U Expired - Lifetime DE29722804U1 (de) | 1997-12-23 | 1997-12-23 | Prüfvorrichtung |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE29722804U1 (de) |
-
1997
- 1997-12-23 DE DE29722804U patent/DE29722804U1/de not_active Expired - Lifetime
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R207 | Utility model specification |
Effective date: 19980416 |
|
R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: G07C0011000000 Ipc: G09B0003000000 Effective date: 19990413 |
|
R150 | Term of protection extended to 6 years |
Effective date: 20010209 |
|
R151 | Term of protection extended to 8 years |
Effective date: 20040317 |
|
R158 | Lapse of ip right after 8 years |
Effective date: 20060701 |