1850689

Information

• Patent Grant
• 1850689

• References
• Source

• Patent Number

  1,850,689

• Date Filed

  Not available

• Date Issued

  Tuesday, March 22, 1932
  92 years ago

• CPC

  • H03B11/08 - interrupter being discharge tube

• US Classifications

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