397504

Information

• Patent Grant
• 397504

• References
• Source

• Patent Number

  397,504

• Date Filed

  Not available

• Date Issued

  Tuesday, February 12, 1889
  136 years ago

• CPC

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

• US Classifications

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