AU122414B2 - Improvements relating to rotary bits for drilling coal and rock - Google Patents

Improvements relating to rotary bits for drilling coal and rock

Info

Publication number
AU122414B2
AU122414B2 AU16607/44A AU1660744A AU122414B2 AU 122414 B2 AU122414 B2 AU 122414B2 AU 16607/44 A AU16607/44 A AU 16607/44A AU 1660744 A AU1660744 A AU 1660744A AU 122414 B2 AU122414 B2 AU 122414B2
Authority
AU
Australia
Prior art keywords
rock
improvements relating
drilling coal
rotary bits
bits
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
AU16607/44A
Other versions
AU1660744A (en
Inventor
Winn William
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.)
Charles Crofton And Co Engineers Ltd
Original Assignee
Charles Crofton And Co Engineers Ltd
Filing date
Publication date
Application filed by Charles Crofton And Co Engineers Ltd filed Critical Charles Crofton And Co Engineers Ltd
Application granted granted Critical
Publication of AU1660744A publication Critical patent/AU1660744A/en
Publication of AU122414B2 publication Critical patent/AU122414B2/en
Expired legal-status Critical Current

Links

AU16607/44A 1944-09-21 Improvements relating to rotary bits for drilling coal and rock Expired AU122414B2 (en)

Publications (2)

Publication Number Publication Date
AU1660744A AU1660744A (en) 1946-10-17
AU122414B2 true AU122414B2 (en) 1946-10-17

Family

ID=

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