426994

Information

• Patent Grant
• 426994

• References
• Source

• Patent Number

  426,994

• Date Filed

  Not available

• Date Issued

  Tuesday, April 29, 1890
  134 years ago

• CPC

  • B24D3/24 - for close-grained structure

• US Classifications

  • 051 - Abrasive tool making process, material, or composition
  • 433 - Dentistry
  • 524 - Synthetic resins or natural rubbers