819021

Information

• Patent Grant
• 819021

• References
• Source

• Patent Number

  819,021

• Date Filed

  Not available

• Date Issued

  Tuesday, April 24, 1906
  118 years ago

• CPC

  • B24B55/06 - Dust extraction equipment on grinding or polishing machines
  • Y10S29/085 - with fluid control valve

• US Classifications

  • 451 - Abrading
  • 029 - Metal working
  • 144 - Woodworking
  • D15 - Machines not elsewhere specified