3119435

Information

• Patent Grant
• 3119435

• References
• Source

• Patent Number

  3,119,435

• Date Filed

  Not available

• Date Issued

  Tuesday, January 28, 1964
  61 years ago

• CPC

  • E06C7/085 - achieved by deforming the rung or the stile
  • B21D39/063 - for assembling ladders
  • Y10T29/4992 - by flaring inserted cup or tube end
  • Y10T29/4994 - Radially expanding internal tube
  • Y10T29/53717 - Annular work

• US Classifications

  • 029 - Metal working
  • 072 - Metal deforming
  • 182 - Fire escape, ladder, or scaffold