1668823

Information

• Patent Grant
• 1668823

• References
• Source

• Patent Number

  1,668,823

• Date Filed

  Not available

• Date Issued

  Tuesday, May 8, 1928
  97 years ago

• CPC

  • F16L51/005 - for concrete pipe-lines

• US Classifications

  • 285 - Pipe joints or couplings
  • 138 - Pipes and tubular conduits