- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F04D - Non-positive-displacement pumps
- F04D 19/04 - Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
Patent holdings for IPC class F04D 19/04
Total number of patents in this class: 993
10-year publication summary
|
34
|
39
|
74
|
69
|
85
|
84
|
103
|
79
|
72
|
42
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Edwards Japan Limited | 429 |
374 |
| Edwards Limited | 788 |
185 |
| Shimadzu Corporation | 6202 |
124 |
| Oerlikon Leybold Vacuum GmbH | 102 |
49 |
| Leybold GmbH | 294 |
37 |
| Pfeiffer Vacuum | 167 |
28 |
| Pfeiffer Vacuum GmbH | 87 |
15 |
| Edwards, s.r.o. | 22 |
8 |
| Ebara Corporation | 2201 |
7 |
| INFICON GmbH | 216 |
7 |
| Lam Research Corporation | 5326 |
6 |
| Agilent Technologies, Inc. | 2630 |
6 |
| Tsinghua University | 5973 |
6 |
| Kyky Technology Co., Ltd. | 11 |
6 |
| Societe de Mecanique Magnetique | 8 |
6 |
| Thermo Fisher Scientific (Bremen) GmbH | 593 |
6 |
| Tokyo Electron Limited | 13008 |
5 |
| Ateliers Busch SA | 50 |
5 |
| Edwards Vacuum LLC | 180 |
5 |
| Atlas Copco Airpower, naamloze vennootschap | 1035 |
4 |
| Other owners | 104 |