3889986

Information

• Patent Grant
• 3889986

• References
• Source

• Patent Number

  3,889,986

• Date Filed

  Not available

• Date Issued

  Tuesday, June 17, 1975
  49 years ago

• CPC

  • E21D23/0073 - with advancing shifting devices connected therewith

• US Classifications

  • 285 - Pipe joints or couplings