1320520

Information

• Patent Grant
• 1320520

• References
• Source

• Patent Number

  1,320,520

• Date Filed

  Not available

• Date Issued

  Tuesday, November 4, 1919
  105 years ago

• CPC

  • G04B29/00 - Frameworks
  • G04B33/14 - Calibers of which the mainsprings or barrels are easily removable

• US Classifications

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