CA181557A - Foret a charbon - Google Patents

Foret a charbon

Info

Publication number
CA181557A
CA181557A CA000181557A CA181557DA CA181557A CA 181557 A CA181557 A CA 181557A CA 000181557 A CA000181557 A CA 000181557A CA 181557D A CA181557D A CA 181557DA CA 181557 A CA181557 A CA 181557A
Authority
CA
Canada
Prior art keywords
coal drill
drill
coal
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
CA000181557A
Other languages
English (en)
Inventor
David S. Bachelder
James Connors
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of CA181557A publication Critical patent/CA181557A/fr
Expired legal-status Critical Current

Links

CA000181557A 1917-10-30 1917-10-30 Foret a charbon Expired CA181557A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA181557T 1917-10-30

Publications (1)

Publication Number Publication Date
CA181557A true CA181557A (fr) 1918-01-08

Family

ID=45301209

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000181557A Expired CA181557A (fr) 1917-10-30 1917-10-30 Foret a charbon

Country Status (1)

Country Link
CA (1) CA181557A (fr)

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