2333251

Information

• Patent Grant
• 2333251

• References
• Source

• Patent Number

  2,333,251

• Date Filed

  Not available

• Date Issued

  Tuesday, November 2, 1943
  81 years ago

• CPC

  • B44B3/04 - wherein non-plane surfaces are worked
  • B44B2700/025 - for engraving a surface of revolution

• US Classifications

  • 216 - Etching a substrate: processes
  • 101 - Printing