2117477

Information

• Patent Grant
• 2117477

• References
• Source

• Patent Number

  2,117,477

• Date Filed

  Not available

• Date Issued

  Tuesday, May 17, 1938
  86 years ago

• CPC

  • F24F11/025 - characterised by velocity control

• US Classifications

  • 454 - Ventilation
  • 138 - Pipes and tubular conduits