2531426

Information

• Patent Grant
• 2531426

• References
• Source

• Patent Number

  2,531,426

• Date Filed

  Not available

• Date Issued

  Tuesday, November 28, 1950
  74 years ago

• CPC

  • H03B7/04 - active element being vacuum tube

• US Classifications

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