BE523142A - - Google Patents

Info

Publication number
BE523142A
BE523142A BE523142DA BE523142A BE 523142 A BE523142 A BE 523142A BE 523142D A BE523142D A BE 523142DA BE 523142 A BE523142 A BE 523142A
Authority
BE
Belgium
Application number
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.)
Publication of BE523142A publication Critical patent/BE523142A/xx

Links

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
    • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/18—Special adaptations of signalling or alarm devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Emergency Alarm Devices (AREA)
BE523142D 1953-03-14 BE523142A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB710853A GB759852A (en) 1953-03-14 1953-03-14 Improvements in or relating to electrically operated signalling systems

Publications (1)

Publication Number Publication Date
BE523142A true BE523142A (enrdf_load_stackoverflow)

Family

ID=9826756

Family Applications (1)

Application Number Title Priority Date Filing Date
BE523142D BE523142A (enrdf_load_stackoverflow) 1953-03-14

Country Status (3)

Country Link
BE (1) BE523142A (enrdf_load_stackoverflow)
FR (1) FR1085295A (enrdf_load_stackoverflow)
GB (1) GB759852A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
GB759852A (en) 1956-10-24
FR1085295A (fr) 1955-01-31

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