CA644004A - Tunneling apparatus - Google Patents

Tunneling apparatus

Info

Publication number
CA644004A
CA644004A CA644004A CA644004DA CA644004A CA 644004 A CA644004 A CA 644004A CA 644004 A CA644004 A CA 644004A CA 644004D A CA644004D A CA 644004DA CA 644004 A CA644004 A CA 644004A
Authority
CA
Canada
Prior art keywords
tunneling apparatus
tunneling
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
CA644004A
Inventor
C. Haspert John
N. Williamson Thomas
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 CA644004A publication Critical patent/CA644004A/en
Expired legal-status Critical Current

Links

CA644004A Tunneling apparatus Expired CA644004A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA644004T

Publications (1)

Publication Number Publication Date
CA644004A true CA644004A (en) 1962-07-03

Family

ID=35922537

Family Applications (1)

Application Number Title Priority Date Filing Date
CA644004A Expired CA644004A (en) Tunneling apparatus

Country Status (1)

Country Link
CA (1) CA644004A (en)

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