2739521

Information

• Patent Grant
• 2739521

• References
• Source

• Patent Number

  2,739,521

• Date Filed

  Not available

• Date Issued

  Tuesday, March 27, 1956
  69 years ago

• CPC

  • F24F7/04 - with ducting systems also by double walls; with natural circulation
  • Y10S454/904 - Magnetic means to hold a damper closed

• US Classifications

  • 454 - Ventilation