305821

Information

• Patent Grant
• 305821

• References
• Source

• Patent Number

  305,821

• Date Filed

  Not available

• Date Issued

  Tuesday, September 30, 1884
  140 years ago

• CPC

  • G04B18/026 - Locking the hair spring in the indexing device

• US Classifications

  • 368 - Horology: time measuring systems or devices