499594

Information

• Patent Grant
• 499594

• References
• Source

• Patent Number

  499,594

• Date Filed

  Not available

• Date Issued

  Tuesday, June 13, 1893
  131 years ago

• CPC

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

• US Classifications

  • 237 - Heating systems
  • 122 - Liquid heaters and vaporizers