2274370

Information

• Patent Grant
• 2274370

• References
• Source

• Patent Number

  2,274,370

• Date Filed

  Not available

• Date Issued

  Tuesday, February 24, 1942
  83 years ago

• CPC

  • G10H5/16 - using cathode ray tube
  • G10H5/08 - tones generated by heterodyning

• US Classifications

  • 084 - Music
  • 333 - Wave transmission lines and networks
  • 984 - Musical instruments