2631840

Information

• Patent Grant
• 2631840

• References
• Source

• Patent Number

  2,631,840

• Date Filed

  Not available

• Date Issued

  Tuesday, March 17, 1953
  71 years ago

• CPC

  • F16F3/04 - composed only of wound springs
  • A47C23/0433 - of different resilience
  • B21F3/12 - of interconnected helical springs
  • B21F35/00 - Making springs from wire
  • B21F35/003 - Multi-filament springs

• US Classifications

  • 267 - Spring devices
  • 005 - Beds