3557681

Information

• Patent Grant
• 3557681

• References
• Source

• Patent Number

  3,557,681

• Date Filed

  Not available

• Date Issued

  Tuesday, January 26, 1971
  53 years ago

• CPC

  • F24F12/001 - with heat-exchange between supplied and exhausted air
  • A01K1/0058 - Construction of air inlets or outlets in roofs
  • Y02B30/563 - Air to air
  • Y02P60/54 - Environmental control in livestock or poultry housing
  • Y02P60/542 - using renewable energy

• US Classifications

  • 454 - Ventilation
  • 415 - Rotary kinetic fluid motors or pumps