1897830

Information

• Patent Grant
• 1897830

• References
• Source

• Patent Number

  1,897,830

• Date Filed

  Not available

• Date Issued

  Tuesday, February 14, 1933
  91 years ago

• CPC

  • G04C1/024 - winding-up springs

• US Classifications

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