1661909

Information

• Patent Grant
• 1661909

• References
• Source

• Patent Number

  1,661,909

• Date Filed

  Not available

• Date Issued

  Tuesday, March 6, 1928
  96 years ago

• CPC

  • G04C3/021 - using mechanical coupling

• US Classifications

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