2156915

Information

• Patent Grant
• 2156915

• References
• Source

• Patent Number

  2,156,915

• Date Filed

  Not available

• Date Issued

  Tuesday, May 2, 1939
  85 years ago

• CPC

  • H01J29/708 - in which the transit time of the electrons has to be taken into account
  • H01J29/60 - Mirrors

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 313 - Electric lamp and discharge devices