1747934

Information

• Patent Grant
• 1747934

• References
• Source

• Patent Number

  1,747,934

• Date Filed

  Not available

• Date Issued

  Tuesday, February 18, 1930
  94 years ago

• CPC

  • C21D1/54 - Determining when the hardening temperature has been reached by measurement of magnetic or electrical properties

• US Classifications

  • 373 - Industrial electric heating furnaces
  • 193 - Conveyors, chutes, skids, guides, and ways
  • 219 - Electric heating
  • 266 - Metallurgical apparatus
  • 324 - Electricity: measuring and testing