2728188

Information

• Patent Grant
• 2728188

• References
• Source

• Patent Number

  2,728,188

• Date Filed

  Not available

• Date Issued

  Tuesday, December 27, 1955
  69 years ago

• CPC

  • G04B31/0126 - Metallic step-bearings

• US Classifications

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