KR890019817U - 수학 교습구 - Google Patents
수학 교습구Info
- Publication number
- KR890019817U KR890019817U KR2019880003713U KR880003713U KR890019817U KR 890019817 U KR890019817 U KR 890019817U KR 2019880003713 U KR2019880003713 U KR 2019880003713U KR 880003713 U KR880003713 U KR 880003713U KR 890019817 U KR890019817 U KR 890019817U
- Authority
- KR
- South Korea
- Prior art keywords
- lesson
- math
- math lesson
- Prior art date
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
- 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
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Computational Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Algebra (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Toys (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019880003713U KR900010821Y1 (ko) | 1988-03-21 | 1988-03-21 | 수학 교습구 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019880003713U KR900010821Y1 (ko) | 1988-03-21 | 1988-03-21 | 수학 교습구 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR890019817U true KR890019817U (ko) | 1989-10-05 |
KR900010821Y1 KR900010821Y1 (ko) | 1990-11-30 |
Family
ID=19273379
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR2019880003713U KR900010821Y1 (ko) | 1988-03-21 | 1988-03-21 | 수학 교습구 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR900010821Y1 (ko) |
-
1988
- 1988-03-21 KR KR2019880003713U patent/KR900010821Y1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR900010821Y1 (ko) | 1990-11-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E701 | Decision to grant or registration of patent right | ||
REGI | Registration of establishment | ||
FPAY | Annual fee payment |
Payment date: 19941118 Year of fee payment: 5 |
|
LAPS | Lapse due to unpaid annual fee |