1622469

Information

• Patent Grant
• 1622469

• References
• Source

• Patent Number

  1,622,469

• Date Filed

  Not available

• Date Issued

  Tuesday, March 29, 1927
  99 years ago

• CPC

  • E04B1/86 - slab-shaped
  • B60B17/0017 - with insonorisation means
  • B60B2900/133 - Noise
  • E04B2001/8428 - containing specially shaped acoustical bodies
  • E04B2001/8447 - with two faacing trays
  • Y10T74/19907 - Sound deadening

• US Classifications

  • 295 - Railway wheels and axles
  • 074 - Machine element or mechanism
  • 105 - Railway rolling stock
  • 181 - Acoustics
  • 238 - Railways: surface track