1940093

Information

• Patent Grant
• 1940093

• References
• Source

• Patent Number

  1,940,093

• Date Filed

  Not available

• Date Issued

  Tuesday, December 19, 1933
  91 years ago

• CPC

  • G10H5/08 - tones generated by heterodyning

• US Classifications

  • 084 - Music
  • 331 - Oscillators
  • 984 - Musical instruments