2161680

Information

• Patent Grant
• 2161680

• References
• Source

• Patent Number

  2,161,680

• Date Filed

  Not available

• Date Issued

  Tuesday, June 6, 1939
  86 years ago

• CPC

  • E04B2/52 - the walls being characterised by fillings in some of the cavities forming load-bearing pillars or beams
  • E04B5/44 - Floors composed of stones, mortar, and reinforcing elements

• US Classifications

  • 052 - Static structures