CA80784A - Blackboard trough - Google Patents

Blackboard trough

Info

Publication number
CA80784A
CA80784A CA000080784A CA80784DA CA80784A CA 80784 A CA80784 A CA 80784A CA 000080784 A CA000080784 A CA 000080784A CA 80784D A CA80784D A CA 80784DA CA 80784 A CA80784 A CA 80784A
Authority
CA
Canada
Prior art keywords
blackboard
trough
blackboard trough
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
CA000080784A
Other languages
French (fr)
Inventor
Thomas R. Baker
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 CA80784A publication Critical patent/CA80784A/en
Expired legal-status Critical Current

Links

CA000080784A 1903-03-18 1903-03-18 Blackboard trough Expired CA80784A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA80784T 1903-03-18

Publications (1)

Publication Number Publication Date
CA80784A true CA80784A (en) 1903-05-05

Family

ID=45197320

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000080784A Expired CA80784A (en) 1903-03-18 1903-03-18 Blackboard trough

Country Status (1)

Country Link
CA (1) CA80784A (en)

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