2161551

Information

• Patent Grant
• 2161551

• References
• Source

• Patent Number

  2,161,551

• Date Filed

  Not available

• Date Issued

  Tuesday, June 6, 1939
  85 years ago

• CPC

  • B43K8/20 - with roller writing-points

• US Classifications

  • 033 - Geometrical instruments
  • 101 - Printing