CA21350A - Rock-dril - Google Patents

Rock-dril

Info

Publication number
CA21350A
CA21350A CA000021350A CA21350DA CA21350A CA 21350 A CA21350 A CA 21350A CA 000021350 A CA000021350 A CA 000021350A CA 21350D A CA21350D A CA 21350DA CA 21350 A CA21350 A CA 21350A
Authority
CA
Canada
Prior art keywords
dril
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
CA000021350A
Other languages
French (fr)
Inventor
Frederic A. Halsey
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 CA21350A publication Critical patent/CA21350A/en
Expired legal-status Critical Current

Links

CA000021350A Rock-dril Expired CA21350A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA21350T

Publications (1)

Publication Number Publication Date
CA21350A true CA21350A (en) 1885-04-01

Family

ID=45137893

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000021350A Expired CA21350A (en) Rock-dril

Country Status (1)

Country Link
CA (1) CA21350A (en)

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