3639853

Information

• Patent Grant
• 3639853

• References
• Source

• Patent Number

  3,639,853

• Date Filed

  Not available

• Date Issued

  Tuesday, February 1, 1972
  53 years ago

• CPC

  • G10H5/12 - using semiconductor devices as active elements

• US Classifications

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