AU236431B2 - Earth strata-hardness responsive means - Google Patents

Earth strata-hardness responsive means

Info

Publication number
AU236431B2
AU236431B2 AU53929/59A AU5392959A AU236431B2 AU 236431 B2 AU236431 B2 AU 236431B2 AU 53929/59 A AU53929/59 A AU 53929/59A AU 5392959 A AU5392959 A AU 5392959A AU 236431 B2 AU236431 B2 AU 236431B2
Authority
AU
Australia
Prior art keywords
hardness
responsive means
earth strata
strata
earth
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
AU53929/59A
Other versions
AU5392959A (en
Inventor
William Heim asier and John Ray Miller John
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
Filing date
Publication date
Application filed by Union Carbide Corp filed Critical Union Carbide Corp
Application granted granted Critical
Publication of AU236431B2 publication Critical patent/AU236431B2/en
Publication of AU5392959A publication Critical patent/AU5392959A/en
Expired legal-status Critical Current

Links

AU53929/59A 1959-10-22 Earth strata-hardness responsive means Expired AU236431B2 (en)

Publications (2)

Publication Number Publication Date
AU236431B2 true AU236431B2 (en) 1960-04-28
AU5392959A AU5392959A (en) 1960-04-28

Family

ID=

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