1987989

Information

• Patent Grant
• 1987989

• References
• Source

• Patent Number

  1,987,989

• Date Filed

  Not available

• Date Issued

  Tuesday, January 15, 1935
  90 years ago

• CPC

  • H01J25/72 - in which a standing wave or a considerable part thereof is produced along an electrode

• US Classifications

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