2646851

Information

• Patent Grant
• 2646851

• References
• Source

• Patent Number

  2,646,851

• Date Filed

  Not available

• Date Issued

  Tuesday, July 28, 1953
  71 years ago

• CPC

  • H04R1/36 - by using a single aperture of dimensions not greater than the shortest operating wavelength

• US Classifications

  • 181 - Acoustics
  • 312 - Supports: cabinet structure