1422521

Information

• Patent Grant
• 1422521

• References
• Source

• Patent Number

  1,422,521

• Date Filed

  Not available

• Date Issued

  Tuesday, July 11, 1922
  102 years ago

• CPC

  • F24H1/16 - helically or spirally coiled
  • Y10S165/438 - Helical

• US Classifications

  • 165 - Heat exchange