3751813

Information

• Patent Grant
• 3751813

• References
• Source

• Patent Number

  3,751,813

• Date Filed

  Not available

• Date Issued

  Tuesday, August 14, 1973
  51 years ago

• CPC

  • B43L9/00 - Circular curve-drawing or like instruments
  • G06G1/04 - characterised by construction

• US Classifications

  • 033 - Geometrical instruments