1920479

Information

• Patent Grant
• 1920479

• References
• Source

• Patent Number

  1,920,479

• Date Filed

  Not available

• Date Issued

  Tuesday, August 1, 1933
  91 years ago

• CPC

  • G04C15/0054 - with power-reserve
  • G04C11/088 - acting on the balance

• US Classifications

  • 226 - Advancing material of indeterminate length
  • 185 - Motors: spring, weight, or animal powered
  • 346 - Recorders
  • 368 - Horology: time measuring systems or devices
  • 968 - Horology