1389953

Information

• Patent Grant
• 1389953

• References
• Source

• Patent Number

  1,389,953

• Date Filed

  Not available

• Date Issued

  Tuesday, September 6, 1921
  103 years ago

• CPC

  • G04B1/185 - Friction clutch between spring and spring cylinder

• US Classifications

  • 185 - Motors: spring, weight, or animal powered
  • 968 - Horology