3269484

Information

• Patent Grant
• 3269484

• References
• Source

• Patent Number

  3,269,484

• Date Filed

  Not available

• Date Issued

  Tuesday, August 30, 1966
  58 years ago

• CPC

  • E01F8/0076 - Cellular
  • E04B1/86 - slab-shaped
  • E04B1/6125 - with protrusions on the one frontal surface co-operating with recesses in the other frontal surface
  • E04B2001/8414 - with non-planar face
  • E04B2001/8428 - containing specially shaped acoustical bodies
  • E04B2001/8442 - Tray type elements
  • E04B2001/8485 - the opening being restricted
  • E04B2001/849 - Groove or slot type openings

• US Classifications

  • 181 - Acoustics