2231689

Information

• Patent Grant
• 2231689

• References
• Source

• Patent Number

  2,231,689

• Date Filed

  Not available

• Date Issued

  Tuesday, February 11, 1941
  84 years ago

• CPC

  • H01H37/004 - with thermal image

• US Classifications

  • 062 - Refrigeration
  • 318 - Electricity: motive power systems