3780846

Information

• Patent Grant
• 3780846

• References
• Source

• Patent Number

  3,780,846

• Date Filed

  Not available

• Date Issued

  Tuesday, December 25, 1973
  51 years ago

• CPC

  • B41J29/26 - Devices, non-fluid media or methods for cancelling, correcting errors, underscoring or ruling
  • B41J5/42 - by strips or tapes
  • B41J5/44 - characterised by storage of recorded information
  • B41J29/36 - for cancelling or correcting errors by overprinting
  • G06F17/24 - Editing

• US Classifications

  • 400 - Typewriting machines
  • 714 - Error detection/correction and fault detection/recovery