- All sections
- B - Performing operationstransporting
- B29C - Shaping or joining of plasticsshaping of material in a plastic state, not otherwise provided forafter-treatment of the shaped products, e.g. repairing
- B29C 47/20 - with annular opening, e.g. for tubular articles
Patent holdings for IPC class B29C 47/20
Total number of patents in this class: 217
10-year publication summary
|
19
|
26
|
18
|
6
|
1
|
0
|
0
|
0
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Windmöller & Hölscher KG | 388 |
12 |
| NGK Insulators, Ltd. | 4853 |
5 |
| Milliken & Company | 1203 |
5 |
| Mitsubishi Gas Chemical Company, Inc. | 3392 |
5 |
| PLA Giken Co., Ltd. | 15 |
5 |
| Corning Incorporated | 10146 |
4 |
| American Maplan Corporation | 11 |
4 |
| Cryovac, Inc. | 375 |
4 |
| Mauser-Werke GmbH | 157 |
4 |
| 5Elem Material Scientific(jiangsu)co.,ltd. | 13 |
4 |
| ExxonMobil Chemical Patents Inc. | 4050 |
3 |
| battenfeld-cincinnati Germany GmbH | 54 |
3 |
| Cambridge Enterprise Limited | 1171 |
3 |
| Greenrock, Ltd. | 5 |
3 |
| Gunze Limited | 351 |
3 |
| Jain Irrigation Systems Limited | 53 |
3 |
| Reifenhauser GmbH & Co. KG Maschinenfabrik | 171 |
3 |
| Nitto Denko Corporation | 8146 |
2 |
| The Yokohama Rubber Co., Ltd. | 4003 |
2 |
| Advanced Drainage Systems, Inc. | 335 |
2 |
| Other owners | 138 |