2174566

Information

• Patent Grant
• 2174566

• References
• Source

• Patent Number

  2,174,566

• Date Filed

  Not available

• Date Issued

  Tuesday, October 3, 1939
  85 years ago

• CPC

  • H03J1/20 - the auxiliary power being switched on as long as controlling current is switched on

• US Classifications

  • 455 - Telecommunications
  • 318 - Electricity: motive power systems
  • 334 - Tuners
  • 346 - Recorders