3531839

Information

• Patent Grant
• 3531839

• References
• Source

• Patent Number

  3,531,839

• Date Filed

  Not available

• Date Issued

  Tuesday, October 6, 1970
  54 years ago

• CPC

  • H01J19/00 - Details of vacuum tubes of the types covered by group H01J21/00
  • H01J19/38 - Control electrodes
  • H01J2893/0017 - Cylindrical, helical or annular grids
  • H01J2893/0022 - Manufacture

• US Classifications

  • 445 - Electric lamp or space discharge component or device manufacturing