2978843

Information

• Patent Grant
• 2978843

• References
• Source

• Patent Number

  2,978,843

• Date Filed

  Not available

• Date Issued

  Tuesday, April 11, 1961
  63 years ago

• CPC

  • B23F13/04 - by grinding

• US Classifications

  • 451 - Abrading
  • 125 - Stone working