3188740

Information

• Patent Grant
• 3188740

• References
• Source

• Patent Number

  3,188,740

• Date Filed

  Not available

• Date Issued

  Tuesday, June 15, 1965
  59 years ago

• CPC

  • B43L13/005 - Portable combined drawing-aids including boards

• US Classifications

  • 033 - Geometrical instruments
  • 281 - Books, strips, and leaves