1393740

Information

• Patent Grant
• 1393740

• References
• Source

• Patent Number

  1,393,740

• Date Filed

  Not available

• Date Issued

  Tuesday, October 18, 1921
  103 years ago

• CPC

  • F28D1/0233 - with air flow channels
  • F28D1/05308 - Assemblies of conduits connected side by side or with individual headers
  • Y10S165/332 - Coaxial ducts define air draft passage and annular passage for heat exchange fluid

• US Classifications

  • 165 - Heat exchange
  • 237 - Heating systems