1993890

Information

• Patent Grant
• 1993890

• References
• Source

• Patent Number

  1,993,890

• Date Filed

  Not available

• Date Issued

  Tuesday, March 12, 1935
  90 years ago

• CPC

  • G10H5/10 - using generation of non-sinusoidal basic tones
  • Y10S84/13 - Gas discharge tube

• US Classifications

  • 084 - Music
  • 315 - Electric lamp and discharge devices: systems
  • 331 - Oscillators
  • 338 - Electrical resistors
  • 361 - Electricity: electrical systems and devices
  • 984 - Musical instruments