- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F28F - Details of heat-exchange or heat-transfer apparatus, of general application
- F28F 1/40 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
Patent holdings for IPC class F28F 1/40
Total number of patents in this class: 735
10-year publication summary
67
|
42
|
66
|
82
|
75
|
68
|
52
|
65
|
30
|
12
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Mitsubishi Electric Corporation | 43934 |
48 |
Denso Corporation | 23338 |
31 |
Calsonic Kansei Corporation | 686 |
20 |
Daikin Industries, Ltd. | 9495 |
15 |
General Electric Company | 18133 |
14 |
Hamilton Sundstrand Corporation | 4525 |
14 |
China Petroleum & Chemical Corporation | 1623 |
13 |
Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation | 297 |
12 |
Wieland-Werke AG | 315 |
12 |
NGK Insulators, Ltd. | 4589 |
11 |
ExxonMobil Chemical Patents Inc. | 4286 |
9 |
MAHLE International GmbH | 2670 |
9 |
Hanon Systems | 1632 |
8 |
UACJ Corporation | 631 |
8 |
LG Electronics Inc. | 69257 |
7 |
Carrier Corporation | 4759 |
7 |
Kubota Corporation | 3054 |
7 |
Mitsubishi Heavy Industries, Ltd. | 8217 |
6 |
Hyundai Motor Company | 19021 |
6 |
New Power Concepts LLC | 29 |
6 |
Other owners | 472 |