2257256

Information

• Patent Grant
• 2257256

• References
• Source

• Patent Number

  2,257,256

• Date Filed

  Not available

• Date Issued

  Tuesday, September 30, 1941
  83 years ago

• CPC

  • B24B3/18 - of taps or reamers

• US Classifications

  • 451 - Abrading
  • 125 - Stone working