2148384

Information

• Patent Grant
• 2148384

• References
• Source

• Patent Number

  2,148,384

• Date Filed

  Not available

• Date Issued

  Tuesday, February 21, 1939
  86 years ago

• CPC

  • H02M5/447 - using discharge tubes only

• US Classifications

  • 307 - Electrical transmission or interconnection systems