- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F04D - Non-positive-displacement pumps
- F04D 13/14 - Combinations of two or more pumps the pumps being all of centrifugal type
Patent holdings for IPC class F04D 13/14
Total number of patents in this class: 175
10-year publication summary
|
10
|
16
|
19
|
17
|
12
|
17
|
15
|
18
|
12
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20419 |
7 |
| Cooler Master Co., Ltd. | 208 |
7 |
| Grundfos Holding A/S | 528 |
7 |
| Grundfos Management a/s | 187 |
6 |
| GHSP, Inc. | 129 |
5 |
| Ebara Corporation | 2080 |
4 |
| ABB Schweiz AG | 6624 |
4 |
| S. A. Armstrong Limited | 54 |
4 |
| Nidec Corporation | 2601 |
3 |
| Nidec GPM GmbH | 140 |
3 |
| S.A. Armstrong Limited, | 83 |
3 |
| Saudi Arabian Oil Company | 12423 |
3 |
| Schlumberger Technology Corporation | 10241 |
2 |
| Buehler Motor GmbH | 4 |
2 |
| IHI Corporation | 3358 |
2 |
| Kickstart International, Inc. | 15 |
2 |
| KSB Aktiengesellschaft | 165 |
2 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3591 |
2 |
| Nippon Oil Pump Co., Ltd. | 29 |
2 |
| Nuovo Pignone S.p.A. | 90 |
2 |
| Other owners | 103 |