1880632

Information

• Patent Grant
• 1880632

• References
• Source

• Patent Number

  1,880,632

• Date Filed

  Not available

• Date Issued

  Tuesday, October 4, 1932
  92 years ago

• CPC

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

• US Classifications

  • 451 - Abrading