2199948

Information

• Patent Grant
• 2199948

• References
• Source

• Patent Number

  2,199,948

• Date Filed

  Not available

• Date Issued

  Tuesday, May 7, 1940
  84 years ago

• CPC

  • G10H3/03 - using pick-up means for reading recorded waves

• US Classifications

  • 084 - Music
  • 310 - Electrical generator or motor structure
  • 984 - Musical instruments