2272520

Information

• Patent Grant
• 2272520

• References
• Source

• Patent Number

  2,272,520

• Date Filed

  Not available

• Date Issued

  Tuesday, February 10, 1942
  83 years ago

• CPC

  • H01K1/68 - with built-in spark gap

• US Classifications

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