3421087

Information

• Patent Grant
• 3421087

• References
• Source

• Patent Number

  3,421,087

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1969
  56 years ago

• CPC

  • H03F1/548 - Protection of anode or grid circuit against overload
  • H03F1/54 - with tubes only
  • H03F1/546 - Delaying application of anode power supply with respect to application of filament heating power supply
  • H04B1/04 - Circuits
  • H04B1/1607 - Supply circuits

• US Classifications

  • 455 - Telecommunications
  • 361 - Electricity: electrical systems and devices