CA21831A - Tableau noir - Google Patents

Tableau noir

Info

Publication number
CA21831A
CA21831A CA000021831A CA21831DA CA21831A CA 21831 A CA21831 A CA 21831A CA 000021831 A CA000021831 A CA 000021831A CA 21831D A CA21831D A CA 21831DA CA 21831 A CA21831 A CA 21831A
Authority
CA
Canada
Prior art keywords
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
CA000021831A
Other languages
English (en)
Inventor
William H. Whittemore
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 CA21831A publication Critical patent/CA21831A/fr
Expired legal-status Critical Current

Links

CA000021831A Tableau noir Expired CA21831A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA21831T

Publications (1)

Publication Number Publication Date
CA21831A true CA21831A (fr) 1885-06-06

Family

ID=45138374

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000021831A Expired CA21831A (fr) Tableau noir

Country Status (1)

Country Link
CA (1) CA21831A (fr)

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