- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01L - Cyclically operating valves for machines or engines
- F01L 21/04 - Valves arranged in or on piston or piston-rod
Patent holdings for IPC class F01L 21/04
Total number of patents in this class: 7
10-year publication summary
|
3
|
0
|
1
|
0
|
2
|
3
|
0
|
0
|
0
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Henkel AG & Co. KGaA | 10129 |
1 |
| Deutsches Zentrum für Luft- und Raumfahrt e.V. | 730 |
1 |
| Foster Hydraulics, Inc. | 1 |
1 |
| Ingersoll-Rand Company | 125 |
1 |
| Thermal Power Recovery LLC | 12 |
1 |
| Ingersoll-Rand Industrial U.S., Inc. | 498 |
1 |
| Fa. H&b Power and Water GmbH | 1 |
1 |
| Other owners | 0 |