3909994

Information

• Patent Grant
• 3909994

• References
• Source

• Patent Number

  3,909,994

• Date Filed

  Not available

• Date Issued

  Tuesday, October 7, 1975
  49 years ago

• CPC

  • E04H15/36 - arch-shaped type
  • E04B1/3211 - Structures with a vertical rotation axis or the like
  • E04B7/105 - Grid-like structures
  • E04D3/366 - by closing the space between the slabs or sheets by gutters, bulges, or bridging elements
  • E04H15/648 - the longitudinal recesses being made from two clamping members
  • E04B2001/3247 - Nodes
  • E04B2001/3252 - Covering details
  • E04B2001/3294 - with a faceted surface

• US Classifications

  • 052 - Static structures
  • 135 - Tent, canopy, umbrella, or cane