2156886

Information

• Patent Grant
• 2156886

• References
• Source

• Patent Number

  2,156,886

• Date Filed

  Not available

• Date Issued

  Tuesday, May 2, 1939
  85 years ago

• CPC

  • H02M1/047 - for ignition at the zero-crossing of voltage or current

• US Classifications

  • 315 - Electric lamp and discharge devices: systems