2643745

Information

• Patent Grant
• 2643745

• References
• Source

• Patent Number

  2,643,745

• Date Filed

  Not available

• Date Issued

  Tuesday, June 30, 1953
  71 years ago

• CPC

  • F16G13/20 - stiff Push-pull chains
  • E01D15/122 - Inflatable or unreelable bridges ; Bridges with main load-supporting structure consisting only of non-rigid elements
  • E04C3/005 - Girders or columns that are rollable, collapsible or otherwise adjustable in length or height

• US Classifications

  • 052 - Static structures
  • 182 - Fire escape, ladder, or scaffold