CA314781A - Dispositif a ouvrir et a fermer les portes - Google Patents

Dispositif a ouvrir et a fermer les portes

Info

Publication number
CA314781A
CA314781A CA314781A CA314781DA CA314781A CA 314781 A CA314781 A CA 314781A CA 314781 A CA314781 A CA 314781A CA 314781D A CA314781D A CA 314781DA CA 314781 A CA314781 A CA 314781A
Authority
CA
Canada
Prior art keywords
opening
closing doors
doors
closing
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
CA314781A
Other languages
English (en)
Inventor
Steele Westover Marvin
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 CA314781A publication Critical patent/CA314781A/fr
Expired legal-status Critical Current

Links

CA314781A Dispositif a ouvrir et a fermer les portes Expired CA314781A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA314781T

Publications (1)

Publication Number Publication Date
CA314781A true CA314781A (fr) 1931-09-01

Family

ID=35274109

Family Applications (1)

Application Number Title Priority Date Filing Date
CA314781A Expired CA314781A (fr) Dispositif a ouvrir et a fermer les portes

Country Status (1)

Country Link
CA (1) CA314781A (fr)

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