2021408

Information

• Patent Grant
• 2021408

• References
• Source

• Patent Number

  2,021,408

• Date Filed

  Not available

• Date Issued

  Tuesday, November 19, 1935
  89 years ago

• CPC

  • F24F11/025 - characterised by velocity control
  • Y10T137/7903 - Weight biased

• US Classifications

  • 454 - Ventilation
  • 137 - Fluid handling
  • 236 - Automatic temperature and humidity regulation
  • 251 - Valves and valve actuation