3221536

Information

• Patent Grant
• 3221536

• References
• Source

• Patent Number

  3,221,536

• Date Filed

  Not available

• Date Issued

  Tuesday, December 7, 1965
  59 years ago

• CPC

  • C21D1/55 - Hardenability tests
  • Y10T29/49544 - Roller making
  • Y10T29/49693 - Roller making
  • Y10T29/49771 - Quantitative measuring or gauging

• US Classifications

  • 374 - Thermal measuring and testing
  • 029 - Metal working