2018709

Information

• Patent Grant
• 2018709

• References
• Source

• Patent Number

  2,018,709

• Date Filed

  Not available

• Date Issued

  Tuesday, October 29, 1935
  89 years ago

• CPC

  • F22B11/02 - the fire tubes being in upright arrangement

• US Classifications

  • 122 - Liquid heaters and vaporizers