620608

Information

• Patent Grant
• 620608

• References
• Source

• Patent Number

  620,608

• Date Filed

  Not available

• Date Issued

  Tuesday, March 7, 1899
  126 years ago

• CPC

  • B02C18/34 - with means for cleaning the perforated discs

• US Classifications

  • 015 - Brushing, scrubbing, and general cleaning