3724144

Information

• Patent Grant
• 3724144

• References
• Source

• Patent Number

  3,724,144

• Date Filed

  Not available

• Date Issued

  Tuesday, April 3, 1973
  52 years ago

• CPC

  • A47C7/425 - Supplementary back-rests to be positioned on a back-rest or the like
  • A47C7/462 - adjustable by mechanical means
  • A47C20/027 - Back supports
  • A47C23/28 - Tensioning devices therefor

• US Classifications

  • 052 - Static structures
  • 005 - Beds
  • 297 - Chairs and seats