2177823

Information

• Patent Grant
• 2177823

• References
• Source

• Patent Number

  2,177,823

• Date Filed

  Not available

• Date Issued

  Tuesday, October 31, 1939
  85 years ago

• CPC

  • F23N3/02 - Regulating draught by direct pressure operation of single valves or dampers
  • F23N3/005 - using electrical or electromechanical means

• US Classifications

  • 236 - Automatic temperature and humidity regulation