3304851

Information

• Patent Grant
• 3304851

• References
• Source

• Patent Number

  3,304,851

• Date Filed

  Not available

• Date Issued

  Tuesday, February 21, 1967
  57 years ago

• CPC

  • E04C1/392 - for ventilating, heating or cooling
  • E04B5/48 - Special adaptations of floors for incorporating ducts

• US Classifications

  • 454 - Ventilation