1668442

Information

• Patent Grant
• 1668442

• References
• Source

• Patent Number

  1,668,442

• Date Filed

  Not available

• Date Issued

  Tuesday, May 1, 1928
  96 years ago

• CPC

  • B21K5/10 - Forming drill-bit shanks
  • Y10S29/024 - Method or apparatus with local heating

• US Classifications

  • 072 - Metal deforming
  • 029 - Metal working
  • 076 - Metal tools and implements, making