1399322

Information

• Patent Grant
• 1399322

• References
• Source

• Patent Number

  1,399,322

• Date Filed

  Not available

• Date Issued

  Tuesday, December 6, 1921
  103 years ago

• CPC

  • G04B37/087 - Protection of wrist or pocket watch cases against dust

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 968 - Horology