2148678

Information

• Patent Grant
• 2148678

• References
• Source

• Patent Number

  2,148,678

• Date Filed

  Not available

• Date Issued

  Tuesday, February 28, 1939
  85 years ago

• CPC

  • G04D7/1207 - only for measuring
  • G01V7/12 - using pendulums

• US Classifications

  • 073 - Measuring and testing
  • 324 - Electricity: measuring and testing
  • 968 - Horology