- 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 20/00 - Heat storage plants or apparatus in generalRegenerative heat-exchange apparatus not covered by groups or
Patent holdings for IPC class F28D 20/00
Total number of patents in this class: 2333
10-year publication summary
|
208
|
193
|
215
|
177
|
170
|
160
|
209
|
182
|
194
|
141
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rondo Energy, Inc. | 73 |
61 |
| Kabushiki Kaisha Toyota Jidoshokki | 1764 |
47 |
| Siemens AG | 24409 |
41 |
| Malta Inc. | 124 |
40 |
| Denso Corporation | 24431 |
37 |
| Nederlandse Organisatie voor Toegepast-natuurwetenschappelijk Onderzoek TNO | 2384 |
27 |
| Valeo Systemes Thermiques | 2733 |
27 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10941 |
23 |
| Mitsubishi Electric Corporation | 46397 |
20 |
| Hydrostor Inc. | 58 |
18 |
| Clean Planet Inc. | 76 |
17 |
| Xi'an Thermal Power Research Institute Co., Ltd. | 348 |
16 |
| Deutsches Zentrum für Luft- und Raumfahrt e.V. | 795 |
15 |
| Kabushiki Kaisha Toyota Chuo Kenkyusho | 621 |
15 |
| Panasonic Corporation | 20050 |
14 |
| Siemens Gamesa Renewable Energy A/S | 1898 |
14 |
| Lumenion GmbH | 23 |
13 |
| NGK Insulators, Ltd. | 5016 |
12 |
| Hutchinson | 469 |
12 |
| Siemens Gamesa Renewable Energy GmbH & Co. KG | 40 |
12 |
| Other owners | 1852 |