JPS61109793U - - Google Patents

Info

Publication number
JPS61109793U
JPS61109793U JP20113584U JP20113584U JPS61109793U JP S61109793 U JPS61109793 U JP S61109793U JP 20113584 U JP20113584 U JP 20113584U JP 20113584 U JP20113584 U JP 20113584U JP S61109793 U JPS61109793 U JP S61109793U
Authority
JP
Japan
Prior art keywords
transparent plate
triangular
ruler
plate body
displayed
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
JP20113584U
Other languages
English (en)
Japanese (ja)
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 filed Critical
Priority to JP20113584U priority Critical patent/JPS61109793U/ja
Publication of JPS61109793U publication Critical patent/JPS61109793U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Drawing Aids And Blackboards (AREA)
JP20113584U 1984-12-24 1984-12-24 Pending JPS61109793U (US06623731-20030923-C00052.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20113584U JPS61109793U (US06623731-20030923-C00052.png) 1984-12-24 1984-12-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20113584U JPS61109793U (US06623731-20030923-C00052.png) 1984-12-24 1984-12-24

Publications (1)

Publication Number Publication Date
JPS61109793U true JPS61109793U (US06623731-20030923-C00052.png) 1986-07-11

Family

ID=30762636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20113584U Pending JPS61109793U (US06623731-20030923-C00052.png) 1984-12-24 1984-12-24

Country Status (1)

Country Link
JP (1) JPS61109793U (US06623731-20030923-C00052.png)

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