FR699846A - Device for cleaning blackboards and blackboard wipers - Google Patents

Device for cleaning blackboards and blackboard wipers

Info

Publication number
FR699846A
FR699846A FR699846DA FR699846A FR 699846 A FR699846 A FR 699846A FR 699846D A FR699846D A FR 699846DA FR 699846 A FR699846 A FR 699846A
Authority
FR
France
Prior art keywords
wipers
blackboard
blackboards
cleaning
cleaning blackboards
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.)
Expired
Application number
Other languages
French (fr)
Inventor
Ervin Adams Wilson Henry Ehret
Roscoe Dewey Strawn
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
Application granted granted Critical
Publication of FR699846A publication Critical patent/FR699846A/en
Expired legal-status Critical Current

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
FR699846D 1930-10-13 1930-07-22 Device for cleaning blackboards and blackboard wipers Expired FR699846A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3064730A GB360612A (en) 1930-10-13 1930-10-13 Improvements in and relating to apparatus for cleaning blackboards and blackboard erasers

Publications (1)

Publication Number Publication Date
FR699846A true FR699846A (en) 1931-02-20

Family

ID=10310904

Family Applications (1)

Application Number Title Priority Date Filing Date
FR699846D Expired FR699846A (en) 1930-10-13 1930-07-22 Device for cleaning blackboards and blackboard wipers

Country Status (2)

Country Link
FR (1) FR699846A (en)
GB (1) GB360612A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2490155A1 (en) * 1980-09-12 1982-03-19 Nakano Bussan Co Ltd WIPING DEVICE OF A TABLE
FR2573699A1 (en) * 1984-11-28 1986-05-30 Lobez Sagues Manuel Device for erasing writing from blackboards

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789306A (en) * 1954-05-26 1957-04-23 Norman A Kath Vacuum cleaner attachment
US3192547A (en) * 1963-10-25 1965-07-06 Robert E Nahrstedt Scrubbing machine with cleaning attachment therefor
CN106004171A (en) * 2016-07-02 2016-10-12 深圳市中幼国际教育科技有限公司 Teaching blackboard capable of automatically wiping dust
CN115500609B (en) * 2022-10-14 2023-11-24 江苏海事职业技术学院 Practical training teaching device of electrical control system and application method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2490155A1 (en) * 1980-09-12 1982-03-19 Nakano Bussan Co Ltd WIPING DEVICE OF A TABLE
FR2573699A1 (en) * 1984-11-28 1986-05-30 Lobez Sagues Manuel Device for erasing writing from blackboards

Also Published As

Publication number Publication date
GB360612A (en) 1931-11-12

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