3665837

Information

• Patent Grant
• 3665837

• References
• Source

• Patent Number

  3,665,837

• Date Filed

  Not available

• Date Issued

  Tuesday, May 30, 1972
  52 years ago

• CPC

  • F24F13/072 - of elongated shape
  • E04B2009/026 - the supporting ceiling grid acting as air diffusers

• US Classifications

  • 454 - Ventilation