CA751806A - Earth boring derrick - Google Patents

Earth boring derrick

Info

Publication number
CA751806A
CA751806A CA751806A CA751806DA CA751806A CA 751806 A CA751806 A CA 751806A CA 751806 A CA751806 A CA 751806A CA 751806D A CA751806D A CA 751806DA CA 751806 A CA751806 A CA 751806A
Authority
CA
Canada
Prior art keywords
earth boring
derrick
boring derrick
earth
boring
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
CA751806A
Inventor
W. Verrell Curtis
H. Zwight Daniel
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.)
Ohio Brass Co
Original Assignee
Ohio Brass Co
Publication date
Application granted granted Critical
Publication of CA751806A publication Critical patent/CA751806A/en
Expired legal-status Critical Current

Links

CA751806A Earth boring derrick Expired CA751806A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA751806T

Publications (1)

Publication Number Publication Date
CA751806A true CA751806A (en) 1967-01-31

Family

ID=36186159

Family Applications (1)

Application Number Title Priority Date Filing Date
CA751806A Expired CA751806A (en) Earth boring derrick

Country Status (1)

Country Link
CA (1) CA751806A (en)

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