CA21416A - Rock drill - Google Patents

Rock drill

Info

Publication number
CA21416A
CA21416A CA000021416A CA21416DA CA21416A CA 21416 A CA21416 A CA 21416A CA 000021416 A CA000021416 A CA 000021416A CA 21416D A CA21416D A CA 21416DA CA 21416 A CA21416 A CA 21416A
Authority
CA
Canada
Prior art keywords
rock drill
drill
rock
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
CA000021416A
Other languages
French (fr)
Inventor
George A. Hoffnagle
Frederick W. Coe
George A. Miller
Charles H. Miller
James Mitchell
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 CA21416A publication Critical patent/CA21416A/en
Expired legal-status Critical Current

Links

CA000021416A Rock drill Expired CA21416A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA21416T

Publications (1)

Publication Number Publication Date
CA21416A true CA21416A (en) 1885-04-14

Family

ID=45137959

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000021416A Expired CA21416A (en) Rock drill

Country Status (1)

Country Link
CA (1) CA21416A (en)

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