• All sections
• B - Performing operations; transporting
• B31B - Making containers of paper, cardboard or material worked in a manner analogous to paper
• B31B 21/26 - Machinery characterised by making rectangular envelopes or bags of flat form, i.e. without structural provision at the base for thickness of contents, from sheets or blanks, e.g. from flattened tubes and having means for folding sheets or blanks

Patent holdings for IPC class B31B 21/26

Total number of patents in this class: 2

10-year publication summary

Principal owners for this class