1778421

Information

• Patent Grant
• 1778421

• References
• Source

• Patent Number

  1,778,421

• Date Filed

  Not available

• Date Issued

  Tuesday, October 14, 1930
  94 years ago

• CPC

  • G04D7/1264 - for complete clockworks

• US Classifications

  • 073 - Measuring and testing
  • 968 - Horology