3189817

Information

• Patent Grant
• 3189817

• References
• Source

• Patent Number

  3,189,817

• Date Filed

  Not available

• Date Issued

  Tuesday, June 15, 1965
  59 years ago

• CPC

  • G01N27/9066 - by measuring the propagation time, or delaying the signals

• US Classifications

  • 324 - Electricity: measuring and testing
  • 346 - Recorders