- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F04B - Positive-displacement machines for liquids; pumps
- F04B 1/0421 - Cylinders
Patent holdings for IPC class F04B 1/0421
Total number of patents in this class: 62
10-year publication summary
|
2
|
1
|
4
|
7
|
12
|
5
|
9
|
6
|
7
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Robert Bosch GmbH | 41717 |
10 |
| Kerr Machine Co. | 117 |
10 |
| ThyssenKrupp AG | 3210 |
6 |
| thyssenkrupp Presta Ilsenburg GmbH | 15 |
3 |
| SPM Oil & Gas Inc. | 316 |
3 |
| Artemis Intelligent Power Limited | 105 |
2 |
| Danfoss Power Solutions GmbH & Co. OHG | 72 |
2 |
| Katadyn Desalination, LLC | 8 |
2 |
| Vulcan Industrial Holdings LLC | 47 |
2 |
| Alfred Kärcher SE & Co. KG | 602 |
2 |
| ThyssenKrupp Dynamic Components GmbH | 26 |
2 |
| Robert Bosch LLC | 83 |
1 |
| Lockheed Martin Corporation | 3303 |
1 |
| Hubbell Incorporated | 3162 |
1 |
| A. Finkl & Sons Co. | 87 |
1 |
| ADVICS Co., Ltd. | 1235 |
1 |
| Maruyama Mfg. Co., Inc. | 38 |
1 |
| Poclain Hydraulics Industrie | 234 |
1 |
| Uhde High Pressure Technologies GmbH | 30 |
1 |
| Voith Patent GmbH | 2731 |
1 |
| Other owners | 9 |