297421

Information

• Patent Grant
• 297421

• References
• Source

• Patent Number

  297,421

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1884
  140 years ago

• CPC

  • G04B37/0436 - Clockwork movements coming out without springs, for allowing time reading or winding

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 063 - Jewelry