3420005

Information

• Patent Grant
• 3420005

• References
• Source

• Patent Number

  3,420,005

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1969
  56 years ago

• CPC

  • B24B9/163 - of gem stones or convex surfaces, cabochons

• US Classifications

  • 451 - Abrading