2687033

Information

• Patent Grant
• 2687033

• References
• Source

• Patent Number

  2,687,033

• Date Filed

  Not available

• Date Issued

  Tuesday, August 24, 1954
  70 years ago

• CPC

  • E04B2/42 - Walls having cavities between, as well as in, the elements Walls of elements each consisting of two or more parts, kept in distance by means of spacers, at least one of the parts having cavities
  • E04B2002/0295 - of which the width is equal to the wall thickness

• US Classifications

  • 052 - Static structures
  • 428 - Stock material or miscellaneous articles
  • 446 - Amusement devices: toys
  • D25 - Building units and construction elements