3638381

Information

• Patent Grant
• 3638381

• References
• Source

• Patent Number

  3,638,381

• Date Filed

  Not available

• Date Issued

  Tuesday, February 1, 1972
  52 years ago

• CPC

  • E04B2/38 - the walls being characterised by fillings in some of the cavities forming load-bearing pillars or beams
  • E04B2/68 - made by filling-up wall cavities

• US Classifications

  • 052 - Static structures