1820318

Information

• Patent Grant
• 1820318

• References
• Source

• Patent Number

  1,820,318

• Date Filed

  Not available

• Date Issued

  Tuesday, August 25, 1931
  93 years ago

• CPC

  • F24D3/08 - in combination with systems for domestic hot-water supply
  • Y10S165/441 - Helical

• US Classifications

  • 165 - Heat exchange