- 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: 2343
10-year publication summary
|
316
|
330
|
259
|
260
|
190
|
212
|
187
|
182
|
174
|
77
|
| 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 | 629 |
91 |
| Mitsubishi Electric Corporation | 45998 |
82 |
| LG Electronics Inc. | 72890 |
69 |
| Denso Corporation | 24248 |
64 |
| Mitsubishi Heavy Industries, Ltd. | 8703 |
61 |
| Daikin Industries, Ltd. | 9995 |
54 |
| Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | 772 |
47 |
| ebm-papst Mulfingen GmbH & Co. KG | 610 |
42 |
| IHI Corporation | 3422 |
42 |
| Nuovo Pignone Tecnologie S.r.l. | 960 |
42 |
| Delta Electronics, Inc. | 2604 |
39 |
| BorgWarner Inc. | 2602 |
36 |
| Samsung Electronics Co., Ltd. | 145630 |
32 |
| Nidec Corporation | 2658 |
30 |
| Pratt & Whitney Canada Corp. | 4722 |
29 |
| Carrier Corporation | 4349 |
27 |
| Robert Bosch GmbH | 42647 |
26 |
| Regal Beloit America, Inc. | 867 |
23 |
| Panasonic Intellectual Property Management Co., Ltd. | 31273 |
22 |
| Hamilton Sundstrand Corporation | 4860 |
22 |
| Other owners | 1463 |