3804157

Information

• Patent Grant
• 3804157

• References
• Source

• Patent Number

  3,804,157

• Date Filed

  Not available

• Date Issued

  Tuesday, April 16, 1974
  50 years ago

• CPC

  • F24D19/04 - in skirtings

• US Classifications

  • 165 - Heat exchange
  • 454 - Ventilation