387321

Information

• Patent Grant
• 387321

• References
• Source

• Patent Number

  387,321

• Date Filed

  Not available

• Date Issued

  Tuesday, August 7, 1888
  136 years ago

• CPC

  • G04B37/087 - Protection of wrist or pocket watch cases against dust
  • G04B37/0436 - Clockwork movements coming out without springs, for allowing time reading or winding

• US Classifications

  • 368 - Horology: time measuring systems or devices