252909

Information

• Patent Grant
• 252909

• References
• Source

• Patent Number

  252,909

• Date Filed

  Not available

• Date Issued

  Tuesday, January 31, 1882
  143 years ago

• CPC

  • F28D17/02 - using rigid bodies
  • Y10S165/031 - Gradated flow area, heat capacity or conductivity

• US Classifications

  • 165 - Heat exchange
  • D25 - Building units and construction elements