3631643

Information

• Patent Grant
• 3631643

• References
• Source

• Patent Number

  3,631,643

• Date Filed

  Not available

• Date Issued

  Tuesday, January 4, 1972
  53 years ago

• CPC

  • E04F15/20 - for sound insulation
  • E04B5/08 - assembled of block-shaped elements

• US Classifications

  • 052 - Static structures