1781286

Information

• Patent Grant
• 1781286

• References
• Source

• Patent Number

  1,781,286

• Date Filed

  Not available

• Date Issued

  Tuesday, November 11, 1930
  94 years ago

• CPC

  • H01J13/14 - Cooling, heating, circulating, filtering, or controlling level of the liquid
  • H01J2893/0081 - Cooling means

• US Classifications

  • 313 - Electric lamp and discharge devices