- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 29/21 - Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
Patent holdings for IPC class B01D 29/21
Total number of patents in this class: 755
10-year publication summary
|
46
|
64
|
74
|
89
|
63
|
62
|
62
|
33
|
43
|
24
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| MANN+HUMMEL GmbH | 1758 |
106 |
| Donaldson Company, Inc. | 1605 |
75 |
| Cummins Filtration IP, Inc. | 808 |
52 |
| HYDAC Filtertechnik GmbH | 296 |
45 |
| Caterpillar Inc. | 9593 |
31 |
| MAHLE International GmbH | 2781 |
23 |
| Hengst SE | 163 |
23 |
| Pall Corporation | 337 |
21 |
| Ufi Filters S.p.A. | 195 |
19 |
| Volvo Truck Corporation | 3426 |
18 |
| Baldwin Filters, Inc. | 245 |
17 |
| Yamashin-filter Corp. | 128 |
14 |
| Robert Bosch GmbH | 42721 |
10 |
| Cummins Filtration Inc. | 195 |
10 |
| Cummins Filtration SARL | 25 |
10 |
| Rt-filtertechnik GmbH | 45 |
9 |
| Derrick Corporation | 247 |
7 |
| Hengst SE & Co. KG | 23 |
7 |
| Mann+Hummel Filtration Technology Group Inc. | 14 |
7 |
| HYDAC Process Technology GmbH | 92 |
6 |
| Other owners | 245 |