1772213

Information

• Patent Grant
• 1772213

• References
• Source

• Patent Number

  1,772,213

• Date Filed

  Not available

• Date Issued

  Tuesday, August 5, 1930
  94 years ago

• CPC

  • E06C1/3835 - having collapsible steps comprising a hinge in their central part
  • Y10T403/32081 - Parallel rotary

• US Classifications

  • 182 - Fire escape, ladder, or scaffold
  • 403 - Joints and connections