531559

Information

• Patent Grant
• 531559

• References
• Source

• Patent Number

  531,559

• Date Filed

  Not available

• Date Issued

  Tuesday, December 25, 1894
  130 years ago

• CPC

  • B60H1/16 - the air being heated by direct contact with the plant

• US Classifications

  • 237 - Heating systems
  • 454 - Ventilation