421770

Information

• Patent Grant
• 421770

• References
• Source

• Patent Number

  421,770

• Date Filed

  Not available

• Date Issued

  Tuesday, February 18, 1890
  135 years ago

• CPC

  • A61M5/165 - Filtering accessories
  • Y10T137/6144 - With core ejectors

• US Classifications

  • 210 - Liquid purification or separation
  • 137 - Fluid handling