3678589

Information

• Patent Grant
• 3678589

• References
• Source

• Patent Number

  3,678,589

• Date Filed

  Not available

• Date Issued

  Tuesday, July 25, 1972
  52 years ago

• CPC

  • A45C11/36 - Cases for drawing or like instruments
  • B43L13/16 - free-hand

• US Classifications

  • 033 - Geometrical instruments