3818522

Information

• Patent Grant
• 3818522

• References
• Source

• Patent Number

  3,818,522

• Date Filed

  Not available

• Date Issued

  Tuesday, June 25, 1974
  50 years ago

• CPC

  • A47C27/144 - inside the mattress
  • A47C21/046 - without active means
  • A47C27/146 - on the outside surface of the mattress
  • A47C27/15 - consisting of two or more layers
  • B68G11/04 - mainly composed of resilient materials
  • Y10T428/24322 - Composite web or sheet

• US Classifications

  • 005 - Beds
  • 297 - Chairs and seats
  • 428 - Stock material or miscellaneous articles