1800011

Information

• Patent Grant
• 1800011

• References
• Source

• Patent Number

  1,800,011

• Date Filed

  Not available

• Date Issued

  Tuesday, April 7, 1931
  93 years ago

• CPC

  • G04B11/003 - with friction member

• US Classifications

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