2188498

Information

• Patent Grant
• 2188498

• References
• Source

• Patent Number

  2,188,498

• Date Filed

  Not available

• Date Issued

  Tuesday, January 30, 1940
  85 years ago

• CPC

  • H03J5/248 - using electromechanical means
  • 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
  • 340 - Communications: electrical