3181679

Information

• Patent Grant
• 3181679

• References
• Source

• Patent Number

  3,181,679

• Date Filed

  Not available

• Date Issued

  Tuesday, May 4, 1965
  59 years ago

• CPC

  • G09B17/00 - Teaching reading
  • A63H33/3083 - Printing machinery
  • B41J3/39 - hand-held

• US Classifications

  • 400 - Typewriting machines