1853657

Information

• Patent Grant
• 1853657

• References
• Source

• Patent Number

  1,853,657

• Date Filed

  Not available

• Date Issued

  Tuesday, April 12, 1932
  92 years ago

• CPC

  • G04D7/1207 - only for measuring
  • G01R35/04 - of instruments for measuring time integral of power or current

• US Classifications

  • 324 - Electricity: measuring and testing
  • 250 - Radiant energy
  • 356 - Optics: measuring and testing
  • 968 - Horology