3293548

Information

• Patent Grant
• 3293548

• References
• Source

• Patent Number

  3,293,548

• Date Filed

  Not available

• Date Issued

  Tuesday, December 20, 1966
  58 years ago

• CPC

  • H02P5/50 - by comparing electrical values representing the speeds
  • G05D3/122 - without modulation
  • G05D3/20 - using a digital comparing device

• US Classifications

  • 324 - Electricity: measuring and testing
  • 340 - Communications: electrical