1903970

Information

• Patent Grant
• 1903970

• References
• Source

• Patent Number

  1,903,970

• Date Filed

  Not available

• Date Issued

  Tuesday, April 18, 1933
  92 years ago

• CPC

  • F22G7/08 - in fire-boxes

• US Classifications

  • 122 - Liquid heaters and vaporizers