- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F04D - Non-positive-displacement pumps
- F04D 29/38 - Blades
Patent holdings for IPC class F04D 29/38
Total number of patents in this class: 1659
10-year publication summary
|
100
|
150
|
166
|
204
|
155
|
174
|
124
|
116
|
114
|
30
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 8674 |
170 |
| Mitsubishi Electric Corporation | 43934 |
109 |
| IHI Corporation | 3268 |
57 |
| General Electric Company | 18133 |
39 |
| GE Infrastructure Technology, LLC | 5873 |
39 |
| Hunter Fan Company | 699 |
37 |
| Safran Aircraft Engines | 5739 |
37 |
| Daikin Industries, Ltd. | 9495 |
36 |
| United Technologies Corporation | 2328 |
32 |
| Midea Group Co., Ltd. | 4025 |
32 |
| LG Electronics Inc. | 69257 |
31 |
| Pratt & Whitney Canada Corp. | 4215 |
30 |
| Rolls-Royce PLC | 2944 |
27 |
| Delta Electronics, Inc. | 2401 |
24 |
| Nidec Corporation | 2579 |
22 |
| Delta T, LLC | 272 |
21 |
| ebm-papst Mulfingen GmbH & Co. KG | 608 |
19 |
| Opple Lighting Co., Ltd. | 698 |
18 |
| Suzhou Opple Lighting Co., Ltd. | 479 |
17 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
16 |
| Other owners | 846 |