3407661

Information

• Patent Grant
• 3407661

• References
• Source

• Patent Number

  3,407,661

• Date Filed

  Not available

• Date Issued

  Tuesday, October 29, 1968
  56 years ago

• CPC

  • E21B21/08 - Controlling or monitoring pressure or flow of drilling fluid
  • G01F23/665 - using pneumatically or hydraulically actuated indicating means

• US Classifications

  • 073 - Measuring and testing