CA453744A - Door lifting mechanism - Google Patents

Door lifting mechanism

Info

Publication number
CA453744A
CA453744A CA453744A CA453744DA CA453744A CA 453744 A CA453744 A CA 453744A CA 453744 A CA453744 A CA 453744A CA 453744D A CA453744D A CA 453744DA CA 453744 A CA453744 A CA 453744A
Authority
CA
Canada
Prior art keywords
lifting mechanism
door lifting
door
lifting
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
CA453744A
Other languages
French (fr)
Inventor
Madland Thorvald
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.)
Youngstown Steel Door Co
Original Assignee
Youngstown Steel Door Co
Publication date
Application granted granted Critical
Publication of CA453744A publication Critical patent/CA453744A/en
Expired legal-status Critical Current

Links

CA453744A Door lifting mechanism Expired CA453744A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA453744T

Publications (1)

Publication Number Publication Date
CA453744A true CA453744A (en) 1948-12-28

Family

ID=35571475

Family Applications (1)

Application Number Title Priority Date Filing Date
CA453744A Expired CA453744A (en) Door lifting mechanism

Country Status (1)

Country Link
CA (1) CA453744A (en)

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