1274438

Information

• Patent Grant
• 1274438

• References
• Source

• Patent Number

  1,274,438

• Date Filed

  Not available

• Date Issued

  Tuesday, August 6, 1918
  106 years ago

• CPC

  • E21F1/08 - Ventilation arrangements in connection with air ducts
  • F16L31/00 - Arrangement for connecting hoses to one another or to flexible sleeves

• US Classifications

  • 285 - Pipe joints or couplings