309377

Information

• Patent Grant
• 309377

• References
• Source

• Patent Number

  309,377

• Date Filed

  Not available

• Date Issued

  Tuesday, December 16, 1884
  140 years ago

• CPC

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

• US Classifications

  • 015 - Brushing, scrubbing, and general cleaning