3808531

Information

• Patent Grant
• 3808531

• References
• Source

• Patent Number

  3,808,531

• Date Filed

  Not available

• Date Issued

  Tuesday, April 30, 1974
  50 years ago

• CPC

  • G05D3/1418 - with ac amplifier chain

• US Classifications

  • 324 - Electricity: measuring and testing