1757543

Information

• Patent Grant
• 1757543

• References
• Source

• Patent Number

  1,757,543

• Date Filed

  Not available

• Date Issued

  Tuesday, May 6, 1930
  94 years ago

• CPC

  • B44B3/04 - wherein non-plane surfaces are worked
  • B44B2700/025 - for engraving a surface of revolution
  • Y10S76/04 - Chromium
  • Y10T29/49986 - Subsequent to metal working

• US Classifications

  • 076 - Metal tools and implements, making
  • 029 - Metal working
  • 205 - Electrolysis: processes, compositions used therein, and methods of preparing the compositions
  • 216 - Etching a substrate: processes
  • 264 - Plastic and nonmetallic article shaping or treating: processes