3621936

Information

• Patent Grant
• 3621936

• References
• Source

• Patent Number

  3,621,936

• Date Filed

  Not available

• Date Issued

  Tuesday, November 23, 1971
  53 years ago

• CPC

  • E06C7/085 - achieved by deforming the rung or the stile
  • E06C7/087 - with a connecting piece installed around the rung

• US Classifications

  • 182 - Fire escape, ladder, or scaffold