CA229890A - Rotary earth boring drill - Google Patents

Rotary earth boring drill

Info

Publication number
CA229890A
CA229890A CA229890A CA229890DA CA229890A CA 229890 A CA229890 A CA 229890A CA 229890 A CA229890 A CA 229890A CA 229890D A CA229890D A CA 229890DA CA 229890 A CA229890 A CA 229890A
Authority
CA
Canada
Prior art keywords
earth boring
boring drill
rotary earth
rotary
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
CA229890A
Other languages
French (fr)
Inventor
Charles Kuldell Rudolph
Robard Hughes 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.)
Hughes Tool Co
Original Assignee
Hughes Tool Co
Publication date
Application granted granted Critical
Publication of CA229890A publication Critical patent/CA229890A/en
Expired legal-status Critical Current

Links

CA229890A Rotary earth boring drill Expired CA229890A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA229890T

Publications (1)

Publication Number Publication Date
CA229890A true CA229890A (en) 1923-03-27

Family

ID=35127263

Family Applications (1)

Application Number Title Priority Date Filing Date
CA229890A Expired CA229890A (en) Rotary earth boring drill

Country Status (1)

Country Link
CA (1) CA229890A (en)

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