1791232

Information

• Patent Grant
• 1791232

• References
• Source

• Patent Number

  1,791,232

• Date Filed

  Not available

• Date Issued

  Tuesday, February 3, 1931
  93 years ago

• CPC

  • E04B1/86 - slab-shaped
  • E04B2001/8414 - with non-planar face
  • E04B2001/8428 - containing specially shaped acoustical bodies
  • E04B2001/8438 - Slot shaped holes
  • E04B2001/8442 - Tray type elements

• US Classifications

  • 181 - Acoustics
  • D25 - Building units and construction elements