346692

Information

• Patent Grant
• 346692

• References
• Source

• Patent Number

  346,692

• Date Filed

  Not available

• Date Issued

  Tuesday, August 3, 1886
  138 years ago

• CPC

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

• US Classifications

  • 015 - Brushing, scrubbing, and general cleaning