2939391

Information

• Patent Grant
• 2939391

• References
• Source

• Patent Number

  2,939,391

• Date Filed

  Not available

• Date Issued

  Tuesday, June 7, 1960
  64 years ago

• CPC

  • H04Q1/4423 - using one signalling frequency
  • F42B3/182 - having shunting means

• US Classifications

  • 102 - Ammunition and explosives
  • 361 - Electricity: electrical systems and devices
  • 439 - Electrical connectors