2711022

Information

• Patent Grant
• 2711022

• References
• Source

• Patent Number

  2,711,022

• Date Filed

  Not available

• Date Issued

  Tuesday, June 21, 1955
  69 years ago

• CPC

  • B43L13/147 - Three-dimensional devices

• US Classifications

  • 033 - Geometrical instruments
  • 434 - Education and demonstration