2111991

Information

• Patent Grant
• 2111991

• References
• Source

• Patent Number

  2,111,991

• Date Filed

  Not available

• Date Issued

  Tuesday, March 22, 1938
  86 years ago

• CPC

  • F24D19/086 - hand-operated
  • Y10T137/7848 - Permits flow at valve interface

• US Classifications

  • 237 - Heating systems
  • 137 - Fluid handling
  • 138 - Pipes and tubular conduits