- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F04B - Positive-displacement machines for liquidspumps
- F04B 39/04 - Measures to avoid lubricant contaminating the pumped fluid
Patent holdings for IPC class F04B 39/04
Total number of patents in this class: 350
10-year publication summary
|
22
|
20
|
27
|
25
|
26
|
22
|
28
|
17
|
19
|
26
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 46926 |
30 |
| Nabtesco Automotive Corporation | 128 |
22 |
| Hoerbiger Wien GmbH | 133 |
19 |
| Daikin Industries, Ltd. | 10166 |
16 |
| Burckhardt Compression AG | 123 |
15 |
| Robert Bosch GmbH | 43063 |
13 |
| Panasonic Corporation | 19966 |
10 |
| Sanden Corporation | 976 |
8 |
| Sanden Holdings Corporation | 208 |
7 |
| Dover Pumps & Process Solutions Segment, Inc. | 23 |
7 |
| Panasonic Intellectual Property Management Co., Ltd. | 32457 |
6 |
| Hitachi Industrial Equipment Systems Co., Ltd. | 1483 |
6 |
| Sanden Automotive Components Corporation | 158 |
6 |
| Hanon Systems | 2008 |
5 |
| Nuovo Pignone Tecnologie S.r.l. | 1046 |
5 |
| LG Electronics Inc. | 73772 |
4 |
| Mitsubishi Heavy Industries, Ltd. | 8875 |
4 |
| Mayekawa Mfg. Co., Ltd. | 333 |
4 |
| Valeo Japan Co., Ltd. | 307 |
4 |
| Hitachi-johnson Controls Air Conditioning, Inc. | 519 |
4 |
| Other owners | 155 |