2177393

Information

• Patent Grant
• 2177393

• References
• Source

• Patent Number

  2,177,393

• Date Filed

  Not available

• Date Issued

  Tuesday, October 24, 1939
  85 years ago

• CPC

  • E04B9/001 - characterised by provisions for heat or sound insulation
  • E04B1/82 - specifically with respect to sound only
  • E04B9/045 - being laminated
  • E04B9/0464 - having irregularities on the faces
  • E04B2001/8272 - Resiliently mounted wall cladding acting as a diaphragmatic sound damper
  • E04B2001/8461 - layered
  • E04B2001/848 - the cavities opening onto the face of the element

• US Classifications

  • 052 - Static structures
  • 181 - Acoustics