AU434462B2 - Retractable drill bits - Google Patents

Retractable drill bits

Info

Publication number
AU434462B2
AU434462B2 AU21039/70A AU2103970A AU434462B2 AU 434462 B2 AU434462 B2 AU 434462B2 AU 21039/70 A AU21039/70 A AU 21039/70A AU 2103970 A AU2103970 A AU 2103970A AU 434462 B2 AU434462 B2 AU 434462B2
Authority
AU
Australia
Prior art keywords
drill bits
retractable drill
retractable
bits
drill
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
AU21039/70A
Other versions
AU2103970A (en
Inventor
Daniel Link Howard
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.)
Norton Christensen Inc
Original Assignee
Christensen Diamond Products Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Christensen Diamond Products Co filed Critical Christensen Diamond Products Co
Application granted granted Critical
Publication of AU434462B2 publication Critical patent/AU434462B2/en
Publication of AU2103970A publication Critical patent/AU2103970A/en
Expired legal-status Critical Current

Links

AU21039/70A 1970-01-19 1970-10-14 Retractable drill bits Expired AU434462B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
USUS3971 1970-01-19

Publications (2)

Publication Number Publication Date
AU434462B2 true AU434462B2 (en) 1972-04-20
AU2103970A AU2103970A (en) 1972-04-20

Family

ID=

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