CA822900A - Roof supports for mine workings - Google Patents

Roof supports for mine workings

Info

Publication number: CA822900A
Authority: CA; Canada
Prior art keywords: roof supports; mine workings; workings; mine; roof
Prior art date: 1969-09-16
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

CA822900A

Inventor

M. Groetschel Karl

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

1969-09-16

1969-09-16 Application granted granted Critical

1969-09-16 Publication of CA822900A publication Critical patent/CA822900A/en

Status Expired legal-status Critical Current

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA822900T

Publications (1)

Publication Number	Publication Date
CA822900A true CA822900A (en)	1969-09-16

Family

ID=36300315

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA822900A Expired CA822900A (en)			Roof supports for mine workings

Country Status (1)

Country	Link
CA (1)	CA822900A (en)

0
- CA CA822900A patent/CA822900A/en not_active Expired

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