CA893207A - Blackboard eraser - Google Patents

Blackboard eraser

Info

Publication number
CA893207A
CA893207A CA893207A CA893207DA CA893207A CA 893207 A CA893207 A CA 893207A CA 893207 A CA893207 A CA 893207A CA 893207D A CA893207D A CA 893207DA CA 893207 A CA893207 A CA 893207A
Authority
CA
Canada
Prior art keywords
blackboard eraser
eraser
blackboard
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
CA893207A
Inventor
E. Fraser Ronald
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
Application granted granted Critical
Publication of CA893207A publication Critical patent/CA893207A/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
CA893207A 1970-12-22 1970-12-22 Blackboard eraser Expired CA893207A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA101235 1970-12-22
US20628371A 1971-12-09 1971-12-09

Publications (1)

Publication Number Publication Date
CA893207A true CA893207A (en) 1972-02-15

Family

ID=25666674

Family Applications (1)

Application Number Title Priority Date Filing Date
CA893207A Expired CA893207A (en) 1970-12-22 1970-12-22 Blackboard eraser

Country Status (2)

Country Link
US (1) US3748684A (en)
CA (1) CA893207A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4543680A (en) * 1984-01-18 1985-10-01 Vlahos Stephanie A Blackboard eraser handle
US4872237A (en) * 1985-11-25 1989-10-10 Smith Lloyd J Chalk dust remover
JPH07506734A (en) * 1992-01-23 1995-07-27 フェイ　アーサー　ジェームス Sponge/squeegee combination
US20040055622A1 (en) * 2002-09-10 2004-03-25 Neal Ned H. Cube white board eraser
USD872178S1 (en) * 2018-01-26 2020-01-07 Ningbo Skl International Co., Ltd. Eraser
USD941393S1 (en) * 2021-01-28 2022-01-18 Comsero, Inc. Eraser

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2249912A (en) * 1939-09-16 1941-07-22 American Crayon Co Blackboard eraser
FR1115369A (en) * 1954-12-13 1956-04-23 Advanced brush
US3081479A (en) * 1960-05-23 1963-03-19 American Cyanamid Co Applicator
US3377643A (en) * 1965-05-25 1968-04-16 Nylonge Corp Wiping device
US3262145A (en) * 1965-09-20 1966-07-26 Progressive Products Inc Blackboard eraser
US3257679A (en) * 1965-10-18 1966-06-28 Joseph Dixon Crucible Co Chalkboard cleaning device
US3447181A (en) * 1968-02-12 1969-06-03 Deseret Pharma Surgical scrub device

Also Published As

Publication number Publication date
US3748684A (en) 1973-07-31

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