- 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: 783
10-year publication summary
|
65
|
76
|
90
|
66
|
67
|
64
|
33
|
44
|
39
|
23
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| MANN+HUMMEL GmbH | 1812 |
108 |
| Donaldson Company, Inc. | 1600 |
77 |
| HYDAC Filtertechnik GmbH | 286 |
46 |
| Cummins Filtration IP, Inc. | 590 |
33 |
| Caterpillar Inc. | 10272 |
32 |
| Atmus Filtration IP Inc. | 273 |
27 |
| MAHLE International GmbH | 2911 |
25 |
| Hengst SE | 181 |
25 |
| Pall Corporation | 341 |
21 |
| Ufi Filters S.p.A. | 193 |
19 |
| Volvo Truck Corporation | 3902 |
19 |
| Baldwin Filters, Inc. | 231 |
17 |
| Yamashin-filter Corp. | 131 |
16 |
| Robert Bosch GmbH | 44128 |
10 |
| Rt-filtertechnik GmbH | 46 |
9 |
| Derrick Corporation | 256 |
7 |
| Hengst SE & Co. KG | 23 |
7 |
| Mann+Hummel Filtration Technology Group Inc. | 14 |
7 |
| HYDAC Process Technology GmbH | 86 |
6 |
| Parker-Hannifin Corporation | 1034 |
6 |
| Other owners | 266 |