- 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: 2479
10-year publication summary
|
330
|
259
|
260
|
190
|
213
|
187
|
186
|
178
|
145
|
93
|
| 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 | 640 |
95 |
| Mitsubishi Electric Corporation | 47971 |
82 |
| LG Electronics Inc. | 75654 |
74 |
| Denso Corporation | 25513 |
69 |
| Mitsubishi Heavy Industries, Ltd. | 9115 |
61 |
| Daikin Industries, Ltd. | 10478 |
52 |
| IHI Corporation | 3532 |
49 |
| Nuovo Pignone Tecnologie S.r.l. | 1206 |
49 |
| Delta Electronics, Inc. | 2828 |
48 |
| Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | 821 |
48 |
| Pratt & Whitney Canada Corp. | 5472 |
41 |
| ebm-papst Mulfingen GmbH & Co. KG | 501 |
40 |
| BorgWarner Inc. | 2581 |
36 |
| Samsung Electronics Co., Ltd. | 157557 |
34 |
| Nidec Corporation | 2806 |
30 |
| Carrier Corporation | 3958 |
29 |
| Robert Bosch GmbH | 44128 |
25 |
| Hamilton Sundstrand Corporation | 5016 |
24 |
| Panasonic Intellectual Property Management Co., Ltd. | 33911 |
23 |
| Acer Incorporated | 2181 |
23 |
| Other owners | 1547 |