- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F04D - Non-positive-displacement pumps
- F04D 29/44 - Fluid-guiding means, e.g. diffusers
Patent holdings for IPC class F04D 29/44
Total number of patents in this class: 2702
10-year publication summary
|
221
|
213
|
211
|
213
|
224
|
204
|
181
|
171
|
161
|
126
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| LG Electronics Inc. | 76328 |
89 |
| Mitsubishi Heavy Industries, Ltd. | 9271 |
85 |
| IHI Corporation | 3554 |
81 |
| Mitsubishi Heavy Industries Compressor Corporation | 650 |
80 |
| Pratt & Whitney Canada Corp. | 5627 |
73 |
| Denso Corporation | 25909 |
70 |
| Mitsubishi Electric Corporation | 48508 |
62 |
| Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | 857 |
56 |
| Panasonic Intellectual Property Management Co., Ltd. | 34685 |
41 |
| Dyson Technology Limited | 4053 |
40 |
| GREE Electric Appliances, Inc. of Zhuhai | 3329 |
34 |
| Daikin Industries, Ltd. | 10546 |
31 |
| Halliburton Energy Services, Inc. | 21300 |
29 |
| Siemens AG | 23943 |
29 |
| Carrier Corporation | 3958 |
28 |
| Midea Group Co., Ltd. | 5102 |
26 |
| Nuovo Pignone Tecnologie S.r.l. | 1127 |
26 |
| Hamilton Sundstrand Corporation | 5012 |
25 |
| Panasonic Corporation | 18572 |
24 |
| BorgWarner Inc. | 2584 |
24 |
| Other owners | 1749 |