2870406

Information

• Patent Grant
• 2870406

• References
• Source

• Patent Number

  2,870,406

• Date Filed

  Not available

• Date Issued

  Tuesday, January 20, 1959
  65 years ago

• CPC

  • G10L19/02 - using spectral analysis
  • G01R19/10 - Measuring sum, difference or ratio
  • G01R19/17 - giving an indication of the number of times this occurs
  • G01R19/18 - using conversion of dc into ac
  • H03M1/142 - the reference generators for the steps being arranged in a common two-dimensional array
  • H03M1/504 - using pulse width modulation

• US Classifications

  • 324 - Electricity: measuring and testing