2487420

Information

• Patent Grant
• 2487420

• References
• Source

• Patent Number

  2,487,420

• Date Filed

  Not available

• Date Issued

  Tuesday, November 8, 1949
  75 years ago

• CPC

  • G10H1/0535 - by switches incorporating a mechanical vibrator, the envelope of the mechanical vibration being used as modulating signal

• US Classifications

  • 084 - Music