1709029

Information

• Patent Grant
• 1709029

• References
• Source

• Patent Number

  1,709,029

• Date Filed

  Not available

• Date Issued

  Tuesday, April 16, 1929
  95 years ago

• CPC

  • H01J19/34 - forming part of the envelope
  • H01J2893/0004 - Anodes formed in central part

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 174 - Electricity: conductors and insulators