3752291

Information

• Patent Grant
• 3752291

• References
• Source

• Patent Number

  3,752,291

• Date Filed

  Not available

• Date Issued

  Tuesday, August 14, 1973
  51 years ago

• CPC

  • B41J31/09 - Ink ribbons characterised by areas carrying media for obliteration or removal of typing errors
  • B41J31/05 - Ink ribbons having coatings other than impression-material coatings

• US Classifications

  • 400 - Typewriting machines