- 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: 326
10-year publication summary
|
23
|
20
|
28
|
26
|
30
|
22
|
29
|
18
|
20
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 45946 |
29 |
| Nabtesco Automotive Corporation | 128 |
22 |
| Hoerbiger Wien GmbH | 132 |
18 |
| Daikin Industries, Ltd. | 9973 |
16 |
| Burckhardt Compression AG | 121 |
15 |
| Panasonic Corporation | 20142 |
10 |
| Sanden Corporation | 966 |
8 |
| Sanden Holdings Corporation | 208 |
7 |
| Panasonic Intellectual Property Management Co., Ltd. | 31201 |
6 |
| Hitachi Industrial Equipment Systems Co., Ltd. | 1453 |
6 |
| Sanden Automotive Components Corporation | 158 |
6 |
| Robert Bosch GmbH | 42614 |
5 |
| Hanon Systems | 1917 |
5 |
| Nuovo Pignone Tecnologie S.r.l. | 957 |
5 |
| LG Electronics Inc. | 72737 |
4 |
| Mitsubishi Heavy Industries, Ltd. | 8685 |
4 |
| Mayekawa Mfg. Co., Ltd. | 339 |
4 |
| Valeo Japan Co., Ltd. | 306 |
4 |
| Hitachi-johnson Controls Air Conditioning, Inc. | 509 |
4 |
| Mitsubishi Heavy Industries Thermal Systems, Ltd. | 885 |
4 |
| Other owners | 144 |