1769988

Information

• Patent Grant
• 1769988

• References
• Source

• Patent Number

  1,769,988

• Date Filed

  Not available

• Date Issued

  Tuesday, July 8, 1930
  94 years ago

• CPC

  • G04D7/125 - for measuring frequency

• US Classifications

  • 073 - Measuring and testing
  • 968 - Horology