JPS565798A - White blackboard or colored blackboard doubling as screen - Google Patents

White blackboard or colored blackboard doubling as screen

Info

Publication number
JPS565798A
JPS565798A JP7692079A JP7692079A JPS565798A JP S565798 A JPS565798 A JP S565798A JP 7692079 A JP7692079 A JP 7692079A JP 7692079 A JP7692079 A JP 7692079A JP S565798 A JPS565798 A JP S565798A
Authority
JP
Japan
Prior art keywords
blackboard
doubling
screen
colored
white
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
Application number
JP7692079A
Other languages
Japanese (ja)
Inventor
Keishiyou Shiyuu
Zenjiyu Chin
Genpachi Izuta
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP7692079A priority Critical patent/JPS565798A/en
Publication of JPS565798A publication Critical patent/JPS565798A/en
Pending legal-status Critical Current

Links

Landscapes

  • Drawing Aids And Blackboards (AREA)
  • Overhead Projectors And Projection Screens (AREA)
JP7692079A 1979-06-20 1979-06-20 White blackboard or colored blackboard doubling as screen Pending JPS565798A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7692079A JPS565798A (en) 1979-06-20 1979-06-20 White blackboard or colored blackboard doubling as screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7692079A JPS565798A (en) 1979-06-20 1979-06-20 White blackboard or colored blackboard doubling as screen

Publications (1)

Publication Number Publication Date
JPS565798A true JPS565798A (en) 1981-01-21

Family

ID=13619129

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7692079A Pending JPS565798A (en) 1979-06-20 1979-06-20 White blackboard or colored blackboard doubling as screen

Country Status (1)

Country Link
JP (1) JPS565798A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59171695A (en) * 1983-03-18 1984-09-28 沖電気工業株式会社 Electronic blackboard device
JP2009061226A (en) * 2007-09-10 2009-03-26 Tokyo Electric Power Co Inc:The Fire door

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5331540B2 (en) * 1972-07-26 1978-09-02

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5331540B2 (en) * 1972-07-26 1978-09-02

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59171695A (en) * 1983-03-18 1984-09-28 沖電気工業株式会社 Electronic blackboard device
JP2009061226A (en) * 2007-09-10 2009-03-26 Tokyo Electric Power Co Inc:The Fire door

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