1813669

Information

• Patent Grant
• 1813669

• References
• Source

• Patent Number

  1,813,669

• Date Filed

  Not available

• Date Issued

  Tuesday, July 7, 1931
  93 years ago

• CPC

  • B44B3/04 - wherein non-plane surfaces are worked
  • B44B2700/025 - for engraving a surface of revolution
  • Y10T16/39 - Ferrules, rings, and thimbles
  • Y10T29/49563 - with coating or casting about a core

• US Classifications

  • 076 - Metal tools and implements, making
  • 016 - Miscellaneous hardware
  • 029 - Metal working
  • 205 - Electrolysis: processes, compositions used therein, and methods of preparing the compositions