- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F04D - Non-positive-displacement pumps
- F04D 29/28 - Rotors specially adapted for elastic fluids for centrifugal or helico-centrifugal pumps
Patent holdings for IPC class F04D 29/28
Total number of patents in this class: 2529
10-year publication summary
|
330
|
259
|
260
|
190
|
213
|
187
|
186
|
178
|
155
|
143
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Heavy Industries Compressor Corporation | 650 |
95 |
| Mitsubishi Electric Corporation | 48546 |
82 |
| LG Electronics Inc. | 76283 |
81 |
| Denso Corporation | 25936 |
69 |
| Mitsubishi Heavy Industries, Ltd. | 9279 |
61 |
| Daikin Industries, Ltd. | 10546 |
54 |
| Delta Electronics, Inc. | 2880 |
50 |
| Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | 859 |
50 |
| IHI Corporation | 3555 |
49 |
| Nuovo Pignone Tecnologie S.r.l. | 1121 |
49 |
| Pratt & Whitney Canada Corp. | 5638 |
42 |
| ebm-papst Mulfingen GmbH & Co. KG | 493 |
39 |
| BorgWarner Inc. | 2587 |
36 |
| Samsung Electronics Co., Ltd. | 159978 |
34 |
| Nidec Corporation | 2832 |
31 |
| Carrier Corporation | 3960 |
29 |
| Robert Bosch GmbH | 44445 |
25 |
| Hamilton Sundstrand Corporation | 5013 |
24 |
| Regal Beloit America, Inc. | 850 |
24 |
| Acer Incorporated | 2210 |
23 |
| Other owners | 1582 |