3020444

Information

• Patent Grant
• 3020444

• References
• Source

• Patent Number

  3,020,444

• Date Filed

  Not available

• Date Issued

  Tuesday, February 6, 1962
  62 years ago

• CPC

  • H01J23/52 - the coupled helices being disposed coaxially around one another

• US Classifications

  • 315 - Electric lamp and discharge devices: systems