- 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: 2371
10-year publication summary
|
313
|
326
|
255
|
256
|
187
|
202
|
185
|
180
|
170
|
97
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Heavy Industries Compressor Corporation | 634 |
91 |
| Mitsubishi Electric Corporation | 46346 |
82 |
| LG Electronics Inc. | 73476 |
69 |
| Denso Corporation | 24404 |
64 |
| Mitsubishi Heavy Industries, Ltd. | 8777 |
61 |
| Daikin Industries, Ltd. | 10058 |
54 |
| Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | 775 |
47 |
| Nuovo Pignone Tecnologie S.r.l. | 994 |
45 |
| IHI Corporation | 3447 |
43 |
| ebm-papst Mulfingen GmbH & Co. KG | 613 |
42 |
| Delta Electronics, Inc. | 2633 |
40 |
| BorgWarner Inc. | 2603 |
36 |
| Pratt & Whitney Canada Corp. | 4817 |
33 |
| Samsung Electronics Co., Ltd. | 147334 |
32 |
| Nidec Corporation | 2669 |
30 |
| Carrier Corporation | 4292 |
28 |
| Robert Bosch GmbH | 42784 |
26 |
| Panasonic Intellectual Property Management Co., Ltd. | 31756 |
23 |
| Hamilton Sundstrand Corporation | 4906 |
23 |
| Regal Beloit America, Inc. | 866 |
23 |
| Other owners | 1479 |