1620506

Information

• Patent Grant
• 1620506

• References
• Source

• Patent Number

  1,620,506

• Date Filed

  Not available

• Date Issued

  Tuesday, March 8, 1927
  98 years ago

• CPC

  • H02M7/445 - using discharge tubes
  • H02M7/533 - using discharge tubes only

• US Classifications

  • 363 - Electric power conversion systems
  • 315 - Electric lamp and discharge devices: systems