1288308

Information

• Patent Grant
• 1288308

• References
• Source

• Patent Number

  1,288,308

• Date Filed

  Not available

• Date Issued

  Tuesday, December 17, 1918
  106 years ago

• CPC

  • G04B39/004 - from a material other than glass
  • Y10T29/5347 - Crystal to watch or clock

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 029 - Metal working
  • 968 - Horology