639177

Information

• Patent Grant
• 639177

• References
• Source

• Patent Number

  639,177

• Date Filed

  Not available

• Date Issued

  Tuesday, December 12, 1899
  125 years ago

• CPC

  • G04B31/008 - Jewel bearings
  • G04B29/022 - Bridges

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 384 - Bearings