2726594

Information

• Patent Grant
• 2726594

• References
• Source

• Patent Number

  2,726,594

• Date Filed

  Not available

• Date Issued

  Tuesday, December 13, 1955
  69 years ago

• CPC

  • E21F1/003 - Ventilation of traffic tunnels

• US Classifications

  • 454 - Ventilation
  • 073 - Measuring and testing
  • 422 - Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing