2270270

Information

• Patent Grant
• 2270270

• References
• Source

• Patent Number

  2,270,270

• Date Filed

  Not available

• Date Issued

  Tuesday, January 20, 1942
  82 years ago

• CPC

  • A44C17/006 - Gems provided with a cavity
  • A44C17/007 - Special types of gems

• US Classifications

  • 063 - Jewelry
  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 428 - Stock material or miscellaneous articles