2577288

Information

• Patent Grant
• 2577288

• References
• Source

• Patent Number

  2,577,288

• Date Filed

  Not available

• Date Issued

  Tuesday, December 4, 1951
  73 years ago

• CPC

  • H04R1/46 - Special adaptations for use as contact microphones
  • Y10S84/15 - Accordions

• US Classifications

  • 084 - Music
  • 381 - Electrical audio signal processing systems and devices
  • D14 - Recording, communication, or information retrieval equipment