CA45567A - Porte automatique pour mines - Google Patents

Porte automatique pour mines

Info

Publication number
CA45567A
CA45567A CA000045567A CA45567DA CA45567A CA 45567 A CA45567 A CA 45567A CA 000045567 A CA000045567 A CA 000045567A CA 45567D A CA45567D A CA 45567DA CA 45567 A CA45567 A CA 45567A
Authority
CA
Canada
Prior art keywords
mines
self
acting doors
doors
acting
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
CA000045567A
Other languages
English (en)
Inventor
William Maddin
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 CA45567A publication Critical patent/CA45567A/fr
Expired legal-status Critical Current

Links

CA000045567A Porte automatique pour mines Expired CA45567A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA45567T

Publications (1)

Publication Number Publication Date
CA45567A true CA45567A (fr) 1894-03-16

Family

ID=45162107

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000045567A Expired CA45567A (fr) Porte automatique pour mines

Country Status (1)

Country Link
CA (1) CA45567A (fr)

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