KR890010488U - 반투명 유지칠판 - Google Patents
반투명 유지칠판Info
- Publication number
- KR890010488U KR890010488U KR2019870019831U KR870019831U KR890010488U KR 890010488 U KR890010488 U KR 890010488U KR 2019870019831 U KR2019870019831 U KR 2019870019831U KR 870019831 U KR870019831 U KR 870019831U KR 890010488 U KR890010488 U KR 890010488U
- Authority
- KR
- South Korea
- Prior art keywords
- blackboard
- translucent
- maintenance
- translucent maintenance
- maintenance blackboard
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
- B43L1/12—Repeatedly-usable boards or tablets for writing or drawing having translucent writing surfaces producing visual impressions by co-operation with backing members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L9/00—Circular curve-drawing or like instruments
- B43L9/02—Compasses
- B43L9/04—Beam compasses
- B43L9/045—Tape compasses
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019870019831U KR900009508Y1 (ko) | 1987-11-17 | 1987-11-17 | 반투명 유지칠판 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019870019831U KR900009508Y1 (ko) | 1987-11-17 | 1987-11-17 | 반투명 유지칠판 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR890010488U true KR890010488U (ko) | 1989-07-08 |
KR900009508Y1 KR900009508Y1 (ko) | 1990-10-13 |
Family
ID=19269493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR2019870019831U KR900009508Y1 (ko) | 1987-11-17 | 1987-11-17 | 반투명 유지칠판 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR900009508Y1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112590431A (zh) * | 2021-01-06 | 2021-04-02 | 杨玮玮 | 一种数学教学绘图仪 |
-
1987
- 1987-11-17 KR KR2019870019831U patent/KR900009508Y1/ko not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112590431A (zh) * | 2021-01-06 | 2021-04-02 | 杨玮玮 | 一种数学教学绘图仪 |
Also Published As
Publication number | Publication date |
---|---|
KR900009508Y1 (ko) | 1990-10-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
REGI | Registration of establishment | ||
FPAY | Annual fee payment |
Payment date: 19980922 Year of fee payment: 9 |
|
LAPS | Lapse due to unpaid annual fee |