JPS57159699A - Manufacture of blackboard on which dark line is drawn - Google Patents
Manufacture of blackboard on which dark line is drawnInfo
- Publication number
- JPS57159699A JPS57159699A JP4498781A JP4498781A JPS57159699A JP S57159699 A JPS57159699 A JP S57159699A JP 4498781 A JP4498781 A JP 4498781A JP 4498781 A JP4498781 A JP 4498781A JP S57159699 A JPS57159699 A JP S57159699A
- Authority
- JP
- Japan
- Prior art keywords
- blackboard
- drawn
- manufacture
- dark line
- dark
- 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.)
- Pending
Links
Landscapes
- Drawing Aids And Blackboards (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4498781A JPS57159699A (en) | 1981-03-26 | 1981-03-26 | Manufacture of blackboard on which dark line is drawn |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4498781A JPS57159699A (en) | 1981-03-26 | 1981-03-26 | Manufacture of blackboard on which dark line is drawn |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57159699A true JPS57159699A (en) | 1982-10-01 |
Family
ID=12706800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4498781A Pending JPS57159699A (en) | 1981-03-26 | 1981-03-26 | Manufacture of blackboard on which dark line is drawn |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57159699A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3195909U (en) * | 2014-11-26 | 2015-02-12 | 日学株式会社 | Case-integrated magnet screen |
JP2015136023A (en) * | 2014-01-16 | 2015-07-27 | 富士通株式会社 | Redundant path provision method and transmission apparatus |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57107896A (en) * | 1980-12-24 | 1982-07-05 | Yodogawa Steel Works | Blackboard containing obscure ray |
-
1981
- 1981-03-26 JP JP4498781A patent/JPS57159699A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57107896A (en) * | 1980-12-24 | 1982-07-05 | Yodogawa Steel Works | Blackboard containing obscure ray |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015136023A (en) * | 2014-01-16 | 2015-07-27 | 富士通株式会社 | Redundant path provision method and transmission apparatus |
JP3195909U (en) * | 2014-11-26 | 2015-02-12 | 日学株式会社 | Case-integrated magnet screen |
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