JPS57107896A - Blackboard containing obscure ray - Google Patents

Blackboard containing obscure ray

Info

Publication number
JPS57107896A
JPS57107896A JP18483980A JP18483980A JPS57107896A JP S57107896 A JPS57107896 A JP S57107896A JP 18483980 A JP18483980 A JP 18483980A JP 18483980 A JP18483980 A JP 18483980A JP S57107896 A JPS57107896 A JP S57107896A
Authority
JP
Japan
Prior art keywords
obscure
ray
blackboard
blackboard containing
obscure ray
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.)
Granted
Application number
JP18483980A
Other languages
Japanese (ja)
Other versions
JPS5953195B2 (en
Inventor
Yorimichi Ookata
Shiyuuji Yamada
Tadahiko Watanabe
Hiroaki Tanabe
Fumio Kanazawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YODOGAWA SEIKOSHO KK
DIC Corp
Yodogawa Steel Works Ltd
Original Assignee
YODOGAWA SEIKOSHO KK
Yodogawa Steel Works Ltd
Dainippon Ink and Chemicals Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by YODOGAWA SEIKOSHO KK, Yodogawa Steel Works Ltd, Dainippon Ink and Chemicals Co Ltd filed Critical YODOGAWA SEIKOSHO KK
Priority to JP18483980A priority Critical patent/JPS5953195B2/en
Publication of JPS57107896A publication Critical patent/JPS57107896A/en
Publication of JPS5953195B2 publication Critical patent/JPS5953195B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Drawing Aids And Blackboards (AREA)
JP18483980A 1980-12-24 1980-12-24 blackboard with dark lines Expired JPS5953195B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18483980A JPS5953195B2 (en) 1980-12-24 1980-12-24 blackboard with dark lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18483980A JPS5953195B2 (en) 1980-12-24 1980-12-24 blackboard with dark lines

Publications (2)

Publication Number Publication Date
JPS57107896A true JPS57107896A (en) 1982-07-05
JPS5953195B2 JPS5953195B2 (en) 1984-12-24

Family

ID=16160209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18483980A Expired JPS5953195B2 (en) 1980-12-24 1980-12-24 blackboard with dark lines

Country Status (1)

Country Link
JP (1) JPS5953195B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57159699A (en) * 1981-03-26 1982-10-01 Sakura Finetechnical Co Ltd Manufacture of blackboard on which dark line is drawn

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57159699A (en) * 1981-03-26 1982-10-01 Sakura Finetechnical Co Ltd Manufacture of blackboard on which dark line is drawn

Also Published As

Publication number Publication date
JPS5953195B2 (en) 1984-12-24

Similar Documents

Publication Publication Date Title
AU533982B2 (en) X ray apparatus
JPS57100291A (en) Screen
JPS579340A (en) Springy buffer supporting body
GB2121784B (en) Scintillation glass
GB2080100B (en) Sponge
GB2090123B (en) Blackboard duster
JPS5779438A (en) Infrared ray analyzer
GB2074858B (en) Compositions containing 3-deazaaden-osine
JPS5716398A (en) Shielding container
GB2075429B (en) Pencil case
JPS56142096A (en) Pencil
JPS57107896A (en) Blackboard containing obscure ray
JPS5798398A (en) Blotter
JPS5760300A (en) Collimator
JPS5781869A (en) Screen
JPS56124299A (en) Device containing structure
JPS5520293A (en) X ray spectrocrystal
JPS5751499A (en) Eraser device
JPS5646794A (en) Blackboard
GB2067404B (en) Absorbent
JPS56146798A (en) Pencil sharpener
JPS56133199A (en) Pencil sharpener
JPS5725541A (en) Buffer
JPS56164296A (en) Shielding structure
JPS5745048A (en) Panel containing core