- 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: 174
10-year publication summary
|
18
|
15
|
17
|
20
|
13
|
10
|
14
|
11
|
5
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Arvos Ljungstrom LLC | 45 |
28 |
| Alstom Technology Ltd | 1109 |
9 |
| Carrier Corporation | 4354 |
7 |
| Howden UK Limited | 8 |
6 |
| Klingenburg GmbH | 27 |
5 |
| Howden UK Limited | 4 |
4 |
| Nortek Air Solutions Canada, Inc. | 121 |
4 |
| NovelAire Technologies, LLC | 9 |
4 |
| Toshiba Materials Co., Ltd. | 663 |
4 |
| Toshiba Corporation | 12317 |
3 |
| Broan-NuTone LLC | 462 |
3 |
| Lennox Industries Inc. | 1116 |
3 |
| Flexit Sverige AB | 3 |
3 |
| Northrop Grumman Systems Corporation | 2951 |
2 |
| Hewlett Packard Enterprise Development LP | 10714 |
2 |
| Air Distribution Technologies IP, LLC | 168 |
2 |
| Amrona AG | 57 |
2 |
| ElringKlinger AG | 535 |
2 |
| Howden Group Limited | 31 |
2 |
| Munters Europe AB | 54 |
2 |
| Other owners | 77 |