1973802

Information

• Patent Grant
• 1973802

• References
• Source

• Patent Number

  1,973,802

• Date Filed

  Not available

• Date Issued

  Tuesday, September 18, 1934
  90 years ago

• CPC

  • F22B13/12 - the auxiliary water tubes lining the fire-box

• US Classifications

  • 122 - Liquid heaters and vaporizers