AU202693B2 - Improvements in rotary drilling machines - Google Patents

Improvements in rotary drilling machines

Info

Publication number
AU202693B2
AU202693B2 AU5776/54A AU577654A AU202693B2 AU 202693 B2 AU202693 B2 AU 202693B2 AU 5776/54 A AU5776/54 A AU 5776/54A AU 577654 A AU577654 A AU 577654A AU 202693 B2 AU202693 B2 AU 202693B2
Authority
AU
Australia
Prior art keywords
rotary drilling
drilling machines
machines
rotary
drilling
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
AU5776/54A
Other versions
AU577654A (en
Inventor
Morton Felix Seawright Robert
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
Application granted granted Critical
Publication of AU577654A publication Critical patent/AU577654A/en
Publication of AU202693B2 publication Critical patent/AU202693B2/en
Expired legal-status Critical Current

Links

AU5776/54A 1954-12-24 Improvements in rotary drilling machines Expired AU202693B2 (en)

Publications (2)

Publication Number Publication Date
AU577654A AU577654A (en) 1955-06-30
AU202693B2 true AU202693B2 (en) 1955-06-30

Family

ID=

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