- 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: 362
10-year publication summary
|
20
|
28
|
26
|
30
|
22
|
29
|
18
|
23
|
28
|
15
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 47893 |
31 |
| Nabtesco Automotive Corporation | 128 |
22 |
| Hoerbiger Wien GmbH | 137 |
19 |
| Daikin Industries, Ltd. | 10457 |
17 |
| Burckhardt Compression AG | 125 |
15 |
| Robert Bosch GmbH | 44064 |
14 |
| Panasonic Corporation | 19134 |
10 |
| Sanden Corporation | 1027 |
8 |
| LG Electronics Inc. | 75561 |
7 |
| Sanden Holdings Corporation | 208 |
7 |
| Dover Pumps & Process Solutions Segment, Inc. | 24 |
7 |
| Panasonic Intellectual Property Management Co., Ltd. | 33792 |
6 |
| Hitachi Industrial Equipment Systems Co., Ltd. | 1535 |
6 |
| Sanden Automotive Components Corporation | 157 |
6 |
| Hanon Systems | 2096 |
5 |
| Nuovo Pignone Tecnologie S.r.l. | 1194 |
5 |
| Mitsubishi Heavy Industries, Ltd. | 9086 |
4 |
| Mayekawa Mfg. Co., Ltd. | 366 |
4 |
| Solar Turbines Incorporated | 510 |
4 |
| Hitachi-johnson Controls Air Conditioning, Inc. | 521 |
4 |
| Other owners | 161 |