1948909

Information

• Patent Grant
• 1948909

• References
• Source

• Patent Number

  1,948,909

• Date Filed

  Not available

• Date Issued

  Tuesday, February 27, 1934
  91 years ago

• CPC

  • E21F1/06 - Duct connections

• US Classifications

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