3651887

Information

• Patent Grant
• 3651887

• References
• Source

• Patent Number

  3,651,887

• Date Filed

  Not available

• Date Issued

  Tuesday, March 28, 1972
  52 years ago

• CPC

  • E04B1/86 - slab-shaped
  • E04B1/617 - with one protrusion on each frontal surface
  • F16B5/0072 - and using screw-thread
  • E04B2001/8263 - Mounting of acoustical elements on supporting structure
  • E04B2001/8433 - with holes in their face
  • E04B2001/8447 - with two faacing trays

• US Classifications

  • 181 - Acoustics
  • 052 - Static structures