CA36873A - Black board - Google Patents

Black board

Info

Publication number
CA36873A
CA36873A CA000036873A CA36873DA CA36873A CA 36873 A CA36873 A CA 36873A CA 000036873 A CA000036873 A CA 000036873A CA 36873D A CA36873D A CA 36873DA CA 36873 A CA36873 A CA 36873A
Authority
CA
Canada
Prior art keywords
black board
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
CA000036873A
Other languages
French (fr)
Inventor
William Nelson Cuthbert
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 CA36873A publication Critical patent/CA36873A/en
Expired legal-status Critical Current

Links

CA000036873A Black board Expired CA36873A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA36873T

Publications (1)

Publication Number Publication Date
CA36873A true CA36873A (en) 1891-06-23

Family

ID=45153413

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000036873A Expired CA36873A (en) Black board

Country Status (1)

Country Link
CA (1) CA36873A (en)

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