- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F04C - Rotary-piston, or oscillating-piston, positive-displacement machines for liquidsrotary-piston, or oscillating-piston, positive-displacement pumps
- F04C 18/12 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
Patent holdings for IPC class F04C 18/12
Total number of patents in this class: 302
10-year publication summary
|
24
|
26
|
29
|
34
|
27
|
37
|
30
|
27
|
18
|
16
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Edwards Limited | 790 |
60 |
| Pfeiffer Vacuum | 167 |
39 |
| Eaton Intelligent Power Limited | 6009 |
33 |
| Leybold GmbH | 295 |
12 |
| Ateliers Busch SA | 50 |
10 |
| Toyota Industries Corporation | 1127 |
8 |
| Jurop S.p.A. | 16 |
8 |
| Eaton Corporation | 1815 |
7 |
| Gardner Denver Schopfheim GmbH | 16 |
7 |
| Oerlikon Leybold Vacuum GmbH | 102 |
7 |
| Elivac Inc. | 9 |
6 |
| Elivac, Co., Ltd., | 9 |
6 |
| Atlas Copco Airpower, naamloze vennootschap | 1035 |
5 |
| Raymond Zhou Shaw | 5 |
4 |
| Edwards, s.r.o. | 21 |
4 |
| Hugo Vogelsang Maschinenbau GmbH | 64 |
3 |
| MegaDyne Medical Products, Inc. | 120 |
3 |
| NOK Corporation | 2224 |
3 |
| Ingersoll-Rand Industrial U.S., Inc. | 509 |
3 |
| Edwards Korea Ltd. | 11 |
3 |
| Other owners | 71 |