2137221

Information

• Patent Grant
• 2137221

• References
• Source

• Patent Number

  2,137,221

• Date Filed

  Not available

• Date Issued

  Tuesday, November 22, 1938
  86 years ago

• CPC

  • H02H5/086 - of cooling or lubricating fluids

• US Classifications

  • 417 - Pumps
  • 200 - Electricity: circuit makers and breakers