- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F28D - Heat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do not come into direct contact; heat storage plants or apparatus in general
- F28D 21/00 - Heat-exchange apparatus not covered by any of the groups
Patent holdings for IPC class F28D 21/00
Total number of patents in this class: 3906
10-year publication summary
|
337
|
444
|
505
|
534
|
482
|
416
|
267
|
265
|
211
|
73
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hanon Systems | 1632 |
125 |
| Valeo Systemes Thermiques | 2471 |
122 |
| MAHLE International GmbH | 2670 |
98 |
| Mitsubishi Electric Corporation | 43934 |
67 |
| Hamilton Sundstrand Corporation | 4525 |
62 |
| Denso Corporation | 23338 |
59 |
| Dana Canada Corporation | 284 |
47 |
| Daikin Industries, Ltd. | 9495 |
45 |
| Modine Manufacturing Company | 305 |
44 |
| General Electric Company | 18133 |
43 |
| Hyundai Motor Company | 19021 |
43 |
| LG Electronics Inc. | 69257 |
42 |
| Rtx Corporation | 8674 |
41 |
| Carrier Corporation | 4759 |
40 |
| Kyungdong Navien Co., Ltd. | 566 |
38 |
| Johnson Controls Tyco IP Holdings LLP | 1584 |
36 |
| Alfa Laval Corporate AB | 1265 |
33 |
| Safran Aircraft Engines | 5739 |
27 |
| The Boeing Company | 19843 |
26 |
| Toyota Motor Corporation | 28582 |
25 |
| Other owners | 2843 |