- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F04C - Rotary-piston, or oscillating-piston, positive-displacement machines for liquids; rotary-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: 280
10-year publication summary
|
20
|
25
|
27
|
30
|
35
|
27
|
37
|
30
|
26
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Edwards Limited | 764 |
58 |
| Pfeiffer Vacuum | 153 |
37 |
| Eaton Intelligent Power Limited | 6113 |
26 |
| Ateliers Busch SA | 53 |
11 |
| Leybold GmbH | 293 |
11 |
| Toyota Industries Corporation | 1010 |
8 |
| Eaton Corporation | 1839 |
7 |
| Jurop S.p.A. | 15 |
7 |
| Oerlikon Leybold Vacuum GmbH | 117 |
7 |
| Gardner Denver Schopfheim GmbH | 18 |
6 |
| Atlas Copco Airpower, naamloze vennootschap | 915 |
5 |
| Elivac Inc. | 7 |
5 |
| Elivac, Co., Ltd., | 7 |
5 |
| Edwards, s.r.o. | 19 |
4 |
| Hugo Vogelsang Maschinenbau GmbH | 65 |
3 |
| NOK Corporation | 2108 |
3 |
| Raymond Zhou Shaw | 4 |
3 |
| The Regents of the University of California | 18943 |
2 |
| Busch Produktions GmbH | 10 |
2 |
| Danfoss Power Solutions GmbH & Co. OHG | 70 |
2 |
| Other owners | 68 |