2390521

Information

• Patent Grant
• 2390521

• References
• Source

• Patent Number

  2,390,521

• Date Filed

  Not available

• Date Issued

  Tuesday, December 11, 1945
  79 years ago

• CPC

  • B24B3/085 - using a template

• US Classifications

  • 451 - Abrading
  • 033 - Geometrical instruments