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CA544819A - Contractile-expansible roof support - Google Patents

Contractile-expansible roof support

Info

Publication number
CA544819A
CA544819A CA544819A CA544819DA CA544819A CA 544819 A CA544819 A CA 544819A CA 544819 A CA544819 A CA 544819A CA 544819D A CA544819D A CA 544819DA CA 544819 A CA544819 A CA 544819A
Authority
CA
Canada
Prior art keywords
contractile
roof support
expansible
expansible roof
support
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
CA544819A
Other languages
French (fr)
Inventor
D. Dosker Cornelius
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.)
Gamble Brothers Inc
Original Assignee
Gamble Brothers Inc
Publication date
Application granted granted Critical
Publication of CA544819A publication Critical patent/CA544819A/en
Expired legal-status Critical Current

Links

CA544819A Contractile-expansible roof support Expired CA544819A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA544819T

Publications (1)

Publication Number Publication Date
CA544819A true CA544819A (en) 1957-08-13

Family

ID=35701991

Family Applications (1)

Application Number Title Priority Date Filing Date
CA544819A Expired CA544819A (en) Contractile-expansible roof support

Country Status (1)

Country Link
CA (1) CA544819A (en)

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