2643438

Information

• Patent Grant
• 2643438

• References
• Source

• Patent Number

  2,643,438

• Date Filed

  Not available

• Date Issued

  Tuesday, June 30, 1953
  71 years ago

• CPC

  • C21D1/02 - Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
  • B21D53/66 - spades shovels
  • Y10T29/27 - Plow or cultivator iron making

• US Classifications

  • 029 - Metal working