- 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: 2448
10-year publication summary
|
326
|
255
|
256
|
187
|
203
|
185
|
180
|
172
|
139
|
55
|
| 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 | 634 |
94 |
| Mitsubishi Electric Corporation | 47602 |
82 |
| LG Electronics Inc. | 74968 |
74 |
| Denso Corporation | 25183 |
68 |
| Mitsubishi Heavy Industries, Ltd. | 9020 |
61 |
| Daikin Industries, Ltd. | 10384 |
51 |
| IHI Corporation | 3514 |
49 |
| Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | 807 |
48 |
| Nuovo Pignone Tecnologie S.r.l. | 1143 |
47 |
| Delta Electronics, Inc. | 2777 |
46 |
| Pratt & Whitney Canada Corp. | 5223 |
40 |
| ebm-papst Mulfingen GmbH & Co. KG | 501 |
40 |
| BorgWarner Inc. | 2580 |
36 |
| Samsung Electronics Co., Ltd. | 153845 |
34 |
| Carrier Corporation | 3964 |
29 |
| Nidec Corporation | 2765 |
29 |
| Robert Bosch GmbH | 43587 |
25 |
| Hamilton Sundstrand Corporation | 5017 |
24 |
| Panasonic Intellectual Property Management Co., Ltd. | 33507 |
23 |
| Regal Beloit America, Inc. | 848 |
23 |
| Other owners | 1525 |