3563278

Information

• Patent Grant
• 3563278

• References
• Source

• Patent Number

  3,563,278

• Date Filed

  Not available

• Date Issued

  Tuesday, February 16, 1971
  54 years ago

• CPC

  • F16L41/025 - with rectangular cross-section
  • F24F13/0209 - characterised by their connecting mens
  • F24F13/0245 - Manufacturing or assembly of air ducts; Methods therefor
  • F24F13/0281 - Multilayer duct

• US Classifications

  • 138 - Pipes and tubular conduits