2308827

Information

• Patent Grant
• 2308827

• References
• Source

• Patent Number

  2,308,827

• Date Filed

  Not available

• Date Issued

  Tuesday, January 19, 1943
  81 years ago

• CPC

  • E04B1/86 - slab-shaped
  • E04B2001/747 - Corrugated materials
  • E04B2001/8428 - containing specially shaped acoustical bodies
  • E04B2001/8433 - with holes in their face
  • E04B2001/8447 - with two faacing trays

• US Classifications

  • 181 - Acoustics