157744

Information

• Patent Grant
• 157744

• References
• Source

• Patent Number

  157,744

• Date Filed

  Not available

• Date Issued

  Tuesday, December 15, 1874
  150 years ago

• CPC

  • B24B5/047 - of workpieces turning about a vertical axis
  • B23F5/06 - the tool being a grinding disc with a plane front surface

• US Classifications

  • 451 - Abrading