1809654

Information

• Patent Grant
• 1809654

• References
• Source

• Patent Number

  1,809,654

• Date Filed

  Not available

• Date Issued

  Tuesday, June 9, 1931
  93 years ago

• CPC

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

• US Classifications

  • 165 - Heat exchange
  • 219 - Electric heating
  • 392 - Electric resistance heating devices