1522305

Information

• Patent Grant
• 1522305

• References
• Source

• Patent Number

  1,522,305

• Date Filed

  Not available

• Date Issued

  Tuesday, January 6, 1925
  100 years ago

• CPC

  • H04L13/184 - Photographic printing and recording
  • H03D1/08 - by means of non-linear two-pole elements
  • H03D1/16 - of discharge tubes

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 178 - Telegraphy
  • 340 - Communications: electrical