3867995

Information

• Patent Grant
• 3867995

• References
• Source

• Patent Number

  3,867,995

• Date Filed

  Not available

• Date Issued

  Tuesday, February 25, 1975
  49 years ago

• CPC

  • E04B1/8218 - soundproof enclosures
  • E04B2001/8254 - Soundproof supporting of building elements
  • E04B2001/8433 - with holes in their face
  • E04B2001/8452 - with peripheral frame members

• US Classifications

  • 181 - Acoustics
  • 052 - Static structures