3825104

Information

• Patent Grant
• 3825104

• References
• Source

• Patent Number

  3,825,104

• Date Filed

  Not available

• Date Issued

  Tuesday, July 23, 1974
  50 years ago

• CPC

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

• US Classifications

  • 400 - Typewriting machines