- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F28D - Heat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do not come into direct contactheat storage plants or apparatus in general
- F28D 19/04 - Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
Patent holdings for IPC class F28D 19/04
Total number of patents in this class: 172
10-year publication summary
|
15
|
17
|
20
|
13
|
10
|
14
|
11
|
6
|
8
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Arvos Ljungstrom LLC | 48 |
28 |
| Alstom Technology Ltd | 1047 |
7 |
| Carrier Corporation | 3960 |
7 |
| Howden Group Limited | 37 |
6 |
| Howden UK Limited | 7 |
5 |
| Klingenburg GmbH | 29 |
5 |
| Howden UK Limited | 4 |
4 |
| Nortek Air Solutions Canada, Inc. | 125 |
4 |
| NovelAire Technologies, LLC | 9 |
4 |
| Toshiba Materials Co., Ltd. | 564 |
4 |
| Lennox Industries Inc. | 1104 |
3 |
| Munters Europe AB | 77 |
3 |
| Flexit Sverige AB | 3 |
3 |
| Northrop Grumman Systems Corporation | 2916 |
2 |
| Hewlett Packard Enterprise Development LP | 11015 |
2 |
| Air Distribution Technologies IP, LLC | 254 |
2 |
| ElringKlinger AG | 574 |
2 |
| Oxycom Beheer B.V. | 17 |
2 |
| REG Synthetic Fuels, LLC | 72 |
2 |
| Research Triangle Institute | 418 |
2 |
| Other owners | 75 |