451246

Information

• Patent Grant
• 451246

• References
• Source

• Patent Number

  451,246

• Date Filed

  Not available

• Date Issued

  Tuesday, April 28, 1891
  133 years ago

• CPC

  • A61C1/0053 - Portable units
  • Y10T74/19512 - Screw

• US Classifications

  • 433 - Dentistry
  • 074 - Machine element or mechanism