CA306662A - Hollow drill steel - Google Patents

Hollow drill steel

Info

Publication number
CA306662A
CA306662A CA306662A CA306662DA CA306662A CA 306662 A CA306662 A CA 306662A CA 306662 A CA306662 A CA 306662A CA 306662D A CA306662D A CA 306662DA CA 306662 A CA306662 A CA 306662A
Authority
CA
Canada
Prior art keywords
drill steel
hollow drill
hollow
steel
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
CA306662A
Other languages
French (fr)
Inventor
Felix Gordon Frederick
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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA306662A publication Critical patent/CA306662A/en
Expired legal-status Critical Current

Links

CA306662A Hollow drill steel Expired CA306662A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA306662T

Publications (1)

Publication Number Publication Date
CA306662A true CA306662A (en) 1930-12-16

Family

ID=35259813

Family Applications (1)

Application Number Title Priority Date Filing Date
CA306662A Expired CA306662A (en) Hollow drill steel

Country Status (1)

Country Link
CA (1) CA306662A (en)

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