2774919

Information

• Patent Grant
• 2774919

• References
• Source

• Patent Number

  2,774,919

• Date Filed

  Not available

• Date Issued

  Tuesday, December 18, 1956
  68 years ago

• CPC

  • E21B33/1208 - characterised by the construction of the sealing or packing means
  • H01H47/20 - for producing frequency-selective operation of the relay

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 331 - Oscillators