3822400

Information

• Patent Grant
• 3822400

• References
• Source

• Patent Number

  3,822,400

• Date Filed

  Not available

• Date Issued

  Tuesday, July 2, 1974
  50 years ago

• CPC

  • H03K3/42 - by the use, as active elements, of opto-electronic devices
  • G01R21/007 - Adapted for special tariff measuring
  • G01R21/1338 - Measuring maximum demand

• US Classifications

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