AU493821A - Improvements in rock drills - Google Patents

Improvements in rock drills

Info

Publication number
AU493821A
AU493821A AU4938/21A AU493821A AU493821A AU 493821 A AU493821 A AU 493821A AU 4938/21 A AU4938/21 A AU 4938/21A AU 493821 A AU493821 A AU 493821A AU 493821 A AU493821 A AU 493821A
Authority
AU
Australia
Prior art keywords
rock drills
drills
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
AU4938/21A
Inventor
William Mathew Sidney
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
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of AU493821A publication Critical patent/AU493821A/en
Expired legal-status Critical Current

Links

AU4938/21A 1921-12-21 Improvements in rock drills Expired AU493821A (en)

Publications (1)

Publication Number Publication Date
AU493821A true AU493821A (en) 1922-11-08

Family

ID=

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