US773936A - Mine-ventilator. - Google Patents

Mine-ventilator. Download PDF

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Publication number
US773936A
US773936A US12583502A US1902125835A US773936A US 773936 A US773936 A US 773936A US 12583502 A US12583502 A US 12583502A US 1902125835 A US1902125835 A US 1902125835A US 773936 A US773936 A US 773936A
Authority
US
United States
Prior art keywords
ventilator
mine
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 - Lifetime
Application number
US12583502A
Inventor
George Himrod
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
Priority to US12583502A priority Critical patent/US773936A/en
Application granted granted Critical
Publication of US773936A publication Critical patent/US773936A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Description

US12583502A 1902-10-03 1902-10-03 Mine-ventilator. Expired - Lifetime US773936A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12583502A US773936A (en) 1902-10-03 1902-10-03 Mine-ventilator.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12583502A US773936A (en) 1902-10-03 1902-10-03 Mine-ventilator.

Publications (1)

Publication Number Publication Date
US773936A true US773936A (en) 1904-11-01

Family

ID=2842421

Family Applications (1)

Application Number Title Priority Date Filing Date
US12583502A Expired - Lifetime US773936A (en) 1902-10-03 1902-10-03 Mine-ventilator.

Country Status (1)

Country Link
US (1) US773936A (en)

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