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CA421178A - Door opening and closing device - Google Patents

Door opening and closing device

Info

Publication number
CA421178A
CA421178A CA421178A CA421178DA CA421178A CA 421178 A CA421178 A CA 421178A CA 421178 A CA421178 A CA 421178A CA 421178D A CA421178D A CA 421178DA CA 421178 A CA421178 A CA 421178A
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
CA421178A
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 CA421178A publication Critical patent/CA421178A/en
Expired legal-status Critical Current

Links

CA421178A Door opening and closing device Expired CA421178A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA421178T

Publications (1)

Publication Number Publication Date
CA421178A true CA421178A (en) 1944-06-27

Family

ID=35532132

Family Applications (1)

Application Number Title Priority Date Filing Date
CA421178A Expired CA421178A (en) Door opening and closing device

Country Status (1)

Country Link
CA (1) CA421178A (en)

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