- 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: 2317
10-year publication summary
|
316
|
330
|
259
|
260
|
190
|
212
|
187
|
181
|
172
|
47
|
| 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 | 625 |
91 |
| Mitsubishi Electric Corporation | 45414 |
81 |
| LG Electronics Inc. | 71880 |
69 |
| Denso Corporation | 24007 |
64 |
| Mitsubishi Heavy Industries, Ltd. | 8573 |
61 |
| Daikin Industries, Ltd. | 9920 |
54 |
| Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | 756 |
47 |
| ebm-papst Mulfingen GmbH & Co. KG | 608 |
42 |
| IHI Corporation | 3379 |
42 |
| Delta Electronics, Inc. | 2555 |
39 |
| Nuovo Pignone Tecnologie S.r.l. | 912 |
39 |
| BorgWarner Inc. | 2617 |
36 |
| Samsung Electronics Co., Ltd. | 142124 |
32 |
| Nidec Corporation | 2623 |
29 |
| Pratt & Whitney Canada Corp. | 4477 |
28 |
| Carrier Corporation | 4376 |
27 |
| Robert Bosch GmbH | 42170 |
26 |
| Regal Beloit America, Inc. | 907 |
23 |
| Panasonic Intellectual Property Management Co., Ltd. | 30506 |
22 |
| Hamilton Sundstrand Corporation | 4802 |
22 |
| Other owners | 1443 |