2787839

Information

• Patent Grant
• 2787839

• References
• Source

• Patent Number

  2,787,839

• Date Filed

  Not available

• Date Issued

  Tuesday, April 9, 1957
  67 years ago

• CPC

  • H01J21/08 - with movable electrode or electrodes

• US Classifications

  • 033 - Geometrical instruments
  • 073 - Measuring and testing
  • 177 - Weighing scales
  • 313 - Electric lamp and discharge devices
  • 374 - Thermal measuring and testing