- All sections
- B - Performing operations; transporting
- B31B - Making containers of paper, cardboard or material worked in a manner analogous to paper
- B31B 50/81 - Forming or attaching accessories, e.g. opening devices, closures or tear strings
Patent holdings for IPC class B31B 50/81
Total number of patents in this class: 162
10-year publication summary
|
12
|
19
|
28
|
30
|
20
|
8
|
13
|
11
|
20
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| WestRock Shared Services, LLC | 578 |
16 |
| Altria Client Services LLC | 1866 |
9 |
| Sonoco Development, Inc. | 776 |
8 |
| Graphic Packaging International, LLC | 1364 |
8 |
| Primapak, LLC | 79 |
5 |
| Packsize LLC | 271 |
4 |
| Totani Corporation | 121 |
4 |
| Pratt Retail Specialties, LLC | 71 |
4 |
| C.M.C. S.p.A. | 34 |
3 |
| Daio Paper Corporation | 1407 |
3 |
| Otor | 27 |
3 |
| Paper Machinery Corporation | 12 |
3 |
| Polytex Fibers Corporation | 29 |
3 |
| Illinois Tool Works Inc. | 11152 |
2 |
| EMD Millipore Corporation | 657 |
2 |
| Airlite Plastics Co. | 93 |
2 |
| British American Tobacco (Investments) Limited | 1032 |
2 |
| Cascades Canada ULC | 635 |
2 |
| DS Smith Packaging Limited | 50 |
2 |
| I.M.A. Industria Macchine Automatiche S.p.A. | 424 |
2 |
| Other owners | 75 |