1802669

Information

• Patent Grant
• 1802669

• References
• Source

• Patent Number

  1,802,669

• Date Filed

  Not available

• Date Issued

  Tuesday, April 28, 1931
  94 years ago

• CPC

  • B60H1/18 - the air being heated from the plant exhaust gases
  • Y10S165/442 - Conduits

• US Classifications

  • 165 - Heat exchange
  • 237 - Heating systems