3019850

Information

• Patent Grant
• 3019850

• References
• Source

• Patent Number

  3,019,850

• Date Filed

  Not available

• Date Issued

  Tuesday, February 6, 1962
  62 years ago

• CPC

  • E04B1/8209 - sound absorbing devices
  • F16L9/003 - with a rectangular cross-section
  • F16L9/21 - made of sound-absorbing materials or with sound-absorbing structure
  • F16L55/02754 - using a central core throttling the passage
  • F24F13/24 - Means for preventing or suppressing noise
  • E04B2001/8433 - with holes in their face
  • E04B2001/848 - the cavities opening onto the face of the element

• US Classifications

  • 181 - Acoustics