CA398342A - Door opening and closing device - Google Patents

Door opening and closing device

Info

Publication number
CA398342A
CA398342A CA398342A CA398342DA CA398342A CA 398342 A CA398342 A CA 398342A CA 398342 A CA398342 A CA 398342A CA 398342D A CA398342D A CA 398342DA CA 398342 A CA398342 A CA 398342A
Authority
CA
Canada
Prior art keywords
door opening
closing device
closing
door
opening
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
CA398342A
Other languages
French (fr)
Inventor
Madland Gabriel
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 CA398342A publication Critical patent/CA398342A/en
Expired legal-status Critical Current

Links

CA398342A Door opening and closing device Expired CA398342A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA398342T

Publications (1)

Publication Number Publication Date
CA398342A true CA398342A (en) 1941-07-29

Family

ID=35408833

Family Applications (1)

Application Number Title Priority Date Filing Date
CA398342A Expired CA398342A (en) Door opening and closing device

Country Status (1)

Country Link
CA (1) CA398342A (en)

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