3823607

Information

• Patent Grant
• 3823607

• References
• Source

• Patent Number

  3,823,607

• Date Filed

  Not available

• Date Issued

  Tuesday, July 16, 1974
  50 years ago

• CPC

  • G01L3/109 - involving measuring phase difference of two signals or pulse trains
  • E21B3/02 - Surface drives for rotary drilling
  • F16D1/06 - for attachment of a member on a shaft or on a shaft-end
  • F42C1/06 - for any direction of impact

• US Classifications

  • 073 - Measuring and testing