1804734

Information

• Patent Grant
• 1804734

• References
• Source

• Patent Number

  1,804,734

• Date Filed

  Not available

• Date Issued

  Tuesday, May 12, 1931
  93 years ago

• CPC

  • G04B39/002 - made of glass

• US Classifications

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