2990513

Information

• Patent Grant
• 2990513

• References
• Source

• Patent Number

  2,990,513

• Date Filed

  Not available

• Date Issued

  Tuesday, June 27, 1961
  63 years ago

• CPC

  • H01J31/04 - with only one or two output electrodes with only two electrically independant groups or electrodes
  • G01R33/0213 - using deviation of charged particles by the magnetic field

• US Classifications

  • 324 - Electricity: measuring and testing
  • 313 - Electric lamp and discharge devices