CA502809A - Effaceur de tableau noir - Google Patents

Effaceur de tableau noir

Info

Publication number
CA502809A
CA502809A CA502809A CA502809DA CA502809A CA 502809 A CA502809 A CA 502809A CA 502809 A CA502809 A CA 502809A CA 502809D A CA502809D A CA 502809DA CA 502809 A CA502809 A CA 502809A
Authority
CA
Canada
Prior art keywords
black board
board eraser
eraser
black
board
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
CA502809A
Other languages
English (en)
Inventor
N. Darling Earl
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
Publication date
Application granted granted Critical
Publication of CA502809A publication Critical patent/CA502809A/fr
Expired legal-status Critical Current

Links

CA502809A Effaceur de tableau noir Expired CA502809A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA502809T

Publications (1)

Publication Number Publication Date
CA502809A true CA502809A (fr) 1954-05-25

Family

ID=35648714

Family Applications (1)

Application Number Title Priority Date Filing Date
CA502809A Expired CA502809A (fr) Effaceur de tableau noir

Country Status (1)

Country Link
CA (1) CA502809A (fr)

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