2029771

Information

• Patent Grant
• 2029771

• References
• Source

• Patent Number

  2,029,771

• Date Filed

  Not available

• Date Issued

  Tuesday, February 4, 1936
  88 years ago

• CPC

  • G09F19/06 - Writing devices

• US Classifications

  • 434 - Education and demonstration
  • 033 - Geometrical instruments
  • 346 - Recorders