3903991

Information

• Patent Grant
• 3903991

• References
• Source

• Patent Number

  3,903,991

• Date Filed

  Not available

• Date Issued

  Tuesday, September 9, 1975
  49 years ago

• CPC

  • E06C7/484 - Supports specially adapted for use with a wall opening
  • E06C1/34 - Ladders attached to structures, such as windows, cornices, poles, or the like
  • E06C7/48 - Ladder heads Supports for heads of ladders for resting against objects

• US Classifications

  • 182 - Fire escape, ladder, or scaffold
  • 248 - Supports