2172970

Information

• Patent Grant
• 2172970

• References
• Source

• Patent Number

  2,172,970

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1939
  85 years ago

• CPC

  • B21D37/20 - Making tools by operations not covered by a single other subclass
  • Y10S29/033 - Scoring with other step
  • Y10T29/49996 - Successive distinct removal operations

• US Classifications

  • 076 - Metal tools and implements, making
  • 029 - Metal working
  • 033 - Geometrical instruments