3417533

Information

• Patent Grant
• 3417533

• References
• Source

• Patent Number

  3,417,533

• Date Filed

  Not available

• Date Issued

  Tuesday, December 24, 1968
  56 years ago

• CPC

  • E21D11/07 - using brick- laying machines
  • E04B2/18 - by interlocking of projections or inserts with indentations
  • E04B2002/0215 - with separate protrusions
  • E04B2002/0221 - of conical shape

• US Classifications

  • 052 - Static structures
  • D25 - Building units and construction elements