1990073

Information

• Patent Grant
• 1990073

• References
• Source

• Patent Number

  1,990,073

• Date Filed

  Not available

• Date Issued

  Tuesday, February 5, 1935
  90 years ago

• CPC

  • F22G7/065 - for locomotive boilers
  • Y10T137/6858 - Locomotive

• US Classifications

  • 137 - Fluid handling
  • 122 - Liquid heaters and vaporizers
  • 237 - Heating systems
  • 285 - Pipe joints or couplings