- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F04C - Rotary-piston, or oscillating-piston, positive-displacement machines for liquidsrotary-piston, or oscillating-piston, positive-displacement pumps
- F04C 25/02 - Adaptations for special use of pumps for elastic fluids for producing high vacuum
Patent holdings for IPC class F04C 25/02
Total number of patents in this class: 665
10-year publication summary
|
45
|
67
|
66
|
54
|
52
|
63
|
49
|
54
|
35
|
20
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Edwards Limited | 790 |
116 |
| Pfeiffer Vacuum | 170 |
60 |
| Leybold GmbH | 297 |
39 |
| Pierburg Pump Technology GmbH | 323 |
37 |
| Ateliers Busch SA | 51 |
27 |
| ULVAC, Inc. | 1382 |
22 |
| Oerlikon Leybold Vacuum GmbH | 107 |
17 |
| Atlas Copco Airpower, naamloze vennootschap | 1019 |
15 |
| Agilent Technologies, Inc. | 2634 |
13 |
| Taiho Kogyo Co., Ltd. | 330 |
12 |
| Ebara Corporation | 2148 |
11 |
| Edwards Japan Limited | 418 |
10 |
| Hella GmbH & Co. KGaA | 1593 |
10 |
| Leybold France SAS | 17 |
10 |
| Nabtesco Automotive Corporation | 128 |
9 |
| Sanoh Industrial Co., Ltd. | 207 |
8 |
| Mikuni Corporation | 344 |
7 |
| Elivac, Co., Ltd., | 9 |
7 |
| Edwards Technologies Vacuum Engineering (Qingdao) Co Ltd | 20 |
7 |
| Gebr. Becker GmbH | 54 |
6 |
| Other owners | 222 |