KR870016345U - 순차 회전식 칠판 지우개 - Google Patents

순차 회전식 칠판 지우개

Info

Publication number
KR870016345U
KR870016345U KR2019860005597U KR860005597U KR870016345U KR 870016345 U KR870016345 U KR 870016345U KR 2019860005597 U KR2019860005597 U KR 2019860005597U KR 860005597 U KR860005597 U KR 860005597U KR 870016345 U KR870016345 U KR 870016345U
Authority
KR
South Korea
Prior art keywords
blackboard eraser
rotary blackboard
sequential rotary
sequential
eraser
Prior art date
Application number
KR2019860005597U
Other languages
English (en)
Other versions
KR890004165Y1 (ko
Inventor
강일청
Original Assignee
강일청
유승근
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 강일청, 유승근 filed Critical 강일청
Priority to KR2019860005597U priority Critical patent/KR890004165Y1/ko
Publication of KR870016345U publication Critical patent/KR870016345U/ko
Application granted granted Critical
Publication of KR890004165Y1 publication Critical patent/KR890004165Y1/ko

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
    • B43L21/00—Blackboard or slate cleaning devices
    • B43L21/04—Wiper holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
KR2019860005597U 1986-04-24 1986-04-24 순차 회전식 칠판 지우개 KR890004165Y1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019860005597U KR890004165Y1 (ko) 1986-04-24 1986-04-24 순차 회전식 칠판 지우개

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019860005597U KR890004165Y1 (ko) 1986-04-24 1986-04-24 순차 회전식 칠판 지우개

Publications (2)

Publication Number Publication Date
KR870016345U true KR870016345U (ko) 1987-11-30
KR890004165Y1 KR890004165Y1 (ko) 1989-06-26

Family

ID=19251043

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019860005597U KR890004165Y1 (ko) 1986-04-24 1986-04-24 순차 회전식 칠판 지우개

Country Status (1)

Country Link
KR (1) KR890004165Y1 (ko)

Also Published As

Publication number Publication date
KR890004165Y1 (ko) 1989-06-26

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Legal Events

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A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
REGI Registration of establishment
LAPS Lapse due to unpaid annual fee