3902397

Information

• Patent Grant
• 3902397

• References
• Source

• Patent Number

  3,902,397

• Date Filed

  Not available

• Date Issued

  Tuesday, September 2, 1975
  49 years ago

• CPC

  • G10H1/18 - Selecting circuits
  • G10H1/185 - associated with key multiplexing

• US Classifications

  • 084 - Music
  • 984 - Musical instruments