3831392

Information

• Patent Grant
• 3831392

• References
• Source

• Patent Number

  3,831,392

• Date Filed

  Not available

• Date Issued

  Tuesday, August 27, 1974
  50 years ago

• CPC

  • F24F5/0046 - using natural energy
  • F25D21/025 - using air pressure differential detectors

• US Classifications

  • 062 - Refrigeration
  • 073 - Measuring and testing