CA197372A - Appareil a ouvrir et a fermer les portes des mines - Google Patents

Appareil a ouvrir et a fermer les portes des mines

Info

Publication number
CA197372A
CA197372A CA197372A CA197372DA CA197372A CA 197372 A CA197372 A CA 197372A CA 197372 A CA197372 A CA 197372A CA 197372D A CA197372D A CA 197372DA CA 197372 A CA197372 A CA 197372A
Authority
CA
Canada
Prior art keywords
operating means
door operating
mine door
mine
operating
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
CA197372A
Other languages
English (en)
Inventor
John Body Joseph
Long Lee
L. Johnson Mason
F. Kilgore Charles
Blevins Alonzo
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 CA197372A publication Critical patent/CA197372A/fr
Expired legal-status Critical Current

Links

CA197372A Appareil a ouvrir et a fermer les portes des mines Expired CA197372A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA197372T

Publications (1)

Publication Number Publication Date
CA197372A true CA197372A (fr) 1920-02-24

Family

ID=35071810

Family Applications (1)

Application Number Title Priority Date Filing Date
CA197372A Expired CA197372A (fr) Appareil a ouvrir et a fermer les portes des mines

Country Status (1)

Country Link
CA (1) CA197372A (fr)

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