CA12703A - Perfectionnements aux machines a miner la houille - Google Patents

Perfectionnements aux machines a miner la houille

Info

Publication number
CA12703A
CA12703A CA000012703A CA12703DA CA12703A CA 12703 A CA12703 A CA 12703A CA 000012703 A CA000012703 A CA 000012703A CA 12703D A CA12703D A CA 12703DA CA 12703 A CA12703 A CA 12703A
Authority
CA
Canada
Prior art keywords
machines
mining coal
mining
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
CA000012703A
Other languages
English (en)
Inventor
Joseph A. Jeffreys
Francis M. Lechner
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 CA12703A publication Critical patent/CA12703A/fr
Expired legal-status Critical Current

Links

CA000012703A Perfectionnements aux machines a miner la houille Expired CA12703A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA12703T

Publications (1)

Publication Number Publication Date
CA12703A true CA12703A (fr) 1881-04-27

Family

ID=45129248

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000012703A Expired CA12703A (fr) Perfectionnements aux machines a miner la houille

Country Status (1)

Country Link
CA (1) CA12703A (fr)

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