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CA284353A - Blackboard - Google Patents

Blackboard

Info

Publication number
CA284353A
CA284353A CA284353A CA284353DA CA284353A CA 284353 A CA284353 A CA 284353A CA 284353 A CA284353 A CA 284353A CA 284353D A CA284353D A CA 284353DA CA 284353 A CA284353 A CA 284353A
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
CA284353A
Other languages
French (fr)
Inventor
Paradis Philippe
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 CA284353A publication Critical patent/CA284353A/en
Expired legal-status Critical Current

Links

CA284353A Blackboard Expired CA284353A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA284353T

Publications (1)

Publication Number Publication Date
CA284353A true CA284353A (en) 1928-10-30

Family

ID=35217444

Family Applications (1)

Application Number Title Priority Date Filing Date
CA284353A Expired CA284353A (en) Blackboard

Country Status (1)

Country Link
CA (1) CA284353A (en)

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