308976

Information

• Patent Grant
• 308976

• References
• Source

• Patent Number

  308,976

• Date Filed

  Not available

• Date Issued

  Tuesday, December 9, 1884
  140 years ago

• CPC

  • B02C15/123 - with rings and interposed rollers

• US Classifications

  • 241 - Solid material comminution or disintegration