- 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: 299
10-year publication summary
|
25
|
27
|
30
|
35
|
27
|
38
|
30
|
27
|
17
|
11
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Edwards Limited | 791 |
60 |
| Pfeiffer Vacuum | 170 |
39 |
| Eaton Intelligent Power Limited | 5979 |
30 |
| Leybold GmbH | 296 |
12 |
| Ateliers Busch SA | 51 |
10 |
| Toyota Industries Corporation | 1112 |
8 |
| Jurop S.p.A. | 16 |
8 |
| Eaton Corporation | 1820 |
7 |
| Gardner Denver Schopfheim GmbH | 17 |
7 |
| Oerlikon Leybold Vacuum GmbH | 106 |
7 |
| Elivac Inc. | 9 |
6 |
| Elivac, Co., Ltd., | 9 |
6 |
| Atlas Copco Airpower, naamloze vennootschap | 1026 |
5 |
| Raymond Zhou Shaw | 5 |
4 |
| Edwards, s.r.o. | 21 |
4 |
| Hugo Vogelsang Maschinenbau GmbH | 64 |
3 |
| NOK Corporation | 2215 |
3 |
| Ingersoll-Rand Industrial U.S., Inc. | 503 |
3 |
| Edwards Korea Ltd. | 11 |
3 |
| Industrial Technologies and Services, LLC | 167 |
3 |
| Other owners | 71 |