1881613

Information

• Patent Grant
• 1881613

• References
• Source

• Patent Number

  1,881,613

• Date Filed

  Not available

• Date Issued

  Tuesday, October 11, 1932
  92 years ago

• CPC

  • G04B39/002 - made of glass

• US Classifications

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