KR890006677U - Blackboard eraser - Google Patents

Blackboard eraser

Info

Publication number
KR890006677U
KR890006677U KR2019870015386U KR870015386U KR890006677U KR 890006677 U KR890006677 U KR 890006677U KR 2019870015386 U KR2019870015386 U KR 2019870015386U KR 870015386 U KR870015386 U KR 870015386U KR 890006677 U KR890006677 U KR 890006677U
Authority
KR
South Korea
Prior art keywords
blackboard eraser
eraser
blackboard
Prior art date
Application number
KR2019870015386U
Other languages
Korean (ko)
Other versions
KR900006968Y1 (en
Inventor
김동식
Original Assignee
윤주칠
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 윤주칠 filed Critical 윤주칠
Priority to KR2019870015386U priority Critical patent/KR900006968Y1/en
Publication of KR890006677U publication Critical patent/KR890006677U/en
Application granted granted Critical
Publication of KR900006968Y1 publication Critical patent/KR900006968Y1/en

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
    • B43L21/02—Blackboard or slate cleaning devices with means for absorbing the chalk dust
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/22—Mountings for motor fan assemblies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/04—Cleaning by suction, with or without auxiliary action

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
KR2019870015386U 1987-09-09 1987-09-09 Black board eraser KR900006968Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019870015386U KR900006968Y1 (en) 1987-09-09 1987-09-09 Black board eraser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019870015386U KR900006968Y1 (en) 1987-09-09 1987-09-09 Black board eraser

Publications (2)

Publication Number Publication Date
KR890006677U true KR890006677U (en) 1989-05-15
KR900006968Y1 KR900006968Y1 (en) 1990-08-04

Family

ID=19267681

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019870015386U KR900006968Y1 (en) 1987-09-09 1987-09-09 Black board eraser

Country Status (1)

Country Link
KR (1) KR900006968Y1 (en)

Also Published As

Publication number Publication date
KR900006968Y1 (en) 1990-08-04

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Legal Events

Date Code Title Description
A201 Request for examination
N231 Notification of change of applicant
N231 Notification of change of applicant
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