1721375

Information

• Patent Grant
• 1721375

• References
• Source

• Patent Number

  1,721,375

• Date Filed

  Not available

• Date Issued

  Tuesday, July 16, 1929
  95 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
  • 340 - Communications: electrical
  • 968 - Horology