- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F04D - Non-positive-displacement pumps
- F04D 29/22 - Rotors specially for centrifugal pumps
Patent holdings for IPC class F04D 29/22
Total number of patents in this class: 1076
10-year publication summary
93
|
141
|
164
|
151
|
117
|
98
|
90
|
108
|
70
|
21
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Weir Minerals Australia, Ltd. | 309 |
39 |
Sulzer Management AG | 613 |
29 |
KSB SE & Co. KGaA | 628 |
29 |
Ebara Corporation | 1951 |
26 |
Mitsubishi Heavy Industries Compressor Corporation | 613 |
16 |
Nuovo Pignone Tecnologie S.r.l. | 789 |
16 |
Halliburton Energy Services, Inc. | 20165 |
15 |
KSB Aktiengesellschaft | 171 |
15 |
Hamilton Sundstrand Corporation | 4525 |
14 |
Mitsubishi Heavy Industries, Ltd. | 8217 |
13 |
Pyrotek, Inc. | 193 |
12 |
Tc1 LLC | 591 |
12 |
Grundfos Holding A/S | 506 |
11 |
Schlumberger Technology Corporation | 9690 |
9 |
PENTAIR Flow Technologies, LLC | 167 |
9 |
Weir Slurry Group, Inc. | 68 |
9 |
Johnson Electric International AG | 390 |
9 |
Terumo Kabushiki Kaisha | 5216 |
8 |
Saudi Arabian Oil Company | 11322 |
8 |
Zhejiang Sanhua Automotive Components Co., Ltd. | 230 |
8 |
Other owners | 769 |