2273768

Information

• Patent Grant
• 2273768

• References
• Source

• Patent Number

  2,273,768

• Date Filed

  Not available

• Date Issued

  Tuesday, February 17, 1942
  82 years ago

• CPC

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

• US Classifications

  • 084 - Music
  • 984 - Musical instruments