503745

Information

• Patent Grant
• 503745

• References
• Source

• Patent Number

  503,745

• Date Filed

  Not available

• Date Issued

  Tuesday, August 22, 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