420012

Information

• Patent Grant
• 420012

• References
• Source

• Patent Number

  420,012

• Date Filed

  Not available

• Date Issued

  Tuesday, January 21, 1890
  135 years ago

• CPC

  • F16F1/041 - with means for modifying the spring characteristics
  • B41F3/58 - Driving, synchronising, or control gear
  • Y10T409/505576 - with fluid-driven bed

• US Classifications

  • 267 - Spring devices
  • 409 - Gear cutting, milling, or planing