2804095

Information

• Patent Grant
• 2804095

• References
• Source

• Patent Number

  2,804,095

• Date Filed

  Not available

• Date Issued

  Tuesday, August 27, 1957
  67 years ago

• CPC

  • E21F1/04 - Air ducts

• US Classifications

  • 138 - Pipes and tubular conduits
  • 248 - Supports
  • 285 - Pipe joints or couplings
  • 454 - Ventilation