1748574

Information

• Patent Grant
• 1748574

• References
• Source

• Patent Number

  1,748,574

• Date Filed

  Not available

• Date Issued

  Tuesday, February 25, 1930
  94 years ago

• CPC

  • F22D1/04 - the tubes having plain outer surfaces

• US Classifications

  • 122 - Liquid heaters and vaporizers