2692924

Information

• Patent Grant
• 2692924

• References
• Source

• Patent Number

  2,692,924

• Date Filed

  Not available

• Date Issued

  Tuesday, October 26, 1954
  70 years ago

• CPC

  • E21D15/46 - with load-measuring devices with alarm devices
  • E21F17/185 - Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence
  • Y10S116/35 - Electroluminescent dials

• US Classifications

  • 200 - Electricity: circuit makers and breakers
  • 116 - Signals and indicators
  • 340 - Communications: electrical