• All sections
• B - Performing operationstransporting
• B41J - Typewritersselective printing mechanisms, i.e. mechanisms printing otherwise than from a formecorrection of typographical errors
• B41J 3/28 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing downwardly on flat surfaces, e.g. of books, drawings, boxes

Patent holdings for IPC class B41J 3/28

Total number of patents in this class: 312

10-year publication summary

Principal owners for this class