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AU144092B2 - Electric percussion drilling apparatus - Google Patents
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AU144092B2 - Electric percussion drilling apparatus - Google Patents

Electric percussion drilling apparatus

Info

Publication number
AU144092B2
AU144092B2 AU31315/49A AU3131549A AU144092B2 AU 144092 B2 AU144092 B2 AU 144092B2 AU 31315/49 A AU31315/49 A AU 31315/49A AU 3131549 A AU3131549 A AU 3131549A AU 144092 B2 AU144092 B2 AU 144092B2
Authority
AU
Australia
Prior art keywords
drilling apparatus
percussion drilling
electric percussion
electric
percussion
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
AU31315/49A
Other versions
AU3131549A (en
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 AU3131549A publication Critical patent/AU3131549A/en
Publication of AU144092B2 publication Critical patent/AU144092B2/en
Expired legal-status Critical Current

Links

AU31315/49A 1949-11-29 Electric percussion drilling apparatus Expired AU144092B2 (en)

Publications (2)

Publication Number Publication Date
AU3131549A AU3131549A (en) 1950-11-02
AU144092B2 true AU144092B2 (en) 1950-11-02

Family

ID=

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