3878391

Information

• Patent Grant
• 3878391

• References
• Source

• Patent Number

  3,878,391

• Date Filed

  Not available

• Date Issued

  Tuesday, April 15, 1975
  50 years ago

• CPC

  • H03K3/42 - by the use, as active elements, of opto-electronic devices
  • G01R11/00 - Electromechanical arrangements for measuring time integral of electric power i.e. electric energy or current
  • G01R11/36 - Induction meters

• US Classifications

  • 250 - Radiant energy
  • 324 - Electricity: measuring and testing