1216556

Information

• Patent Grant
• 1216556

• References
• Source

• Patent Number

  1,216,556

• Date Filed

  Not available

• Date Issued

  Tuesday, February 20, 1917
  107 years ago

• CPC

  • G04B45/046 - the driving mechanism of the hands being invisible because of special shielding

• US Classifications

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