- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F28F - Details of heat-exchange or heat-transfer apparatus, of general application
- F28F 1/20 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being attachable to the element
Patent holdings for IPC class F28F 1/20
Total number of patents in this class: 136
10-year publication summary
|
7
|
12
|
9
|
10
|
6
|
18
|
9
|
6
|
9
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 48048 |
15 |
| Holtec International, Inc. | 275 |
5 |
| Kyungdong Navien Co., Ltd. | 642 |
5 |
| Rheem Manufacturing Company | 1020 |
4 |
| I.R.C.A. S.p.A. Industria Resistenze Corazzate e Affini | 167 |
3 |
| MAHLE International GmbH | 2917 |
3 |
| Samsung Electronics Co., Ltd. | 157946 |
2 |
| DENSO International America, Inc. | 642 |
2 |
| Whirlpool Corporation | 4643 |
2 |
| Daikin Industries, Ltd. | 10504 |
2 |
| Controls Southeast, Inc. | 35 |
2 |
| Dana Canada Corporation | 268 |
2 |
| Deutsches Zentrum für Luft- und Raumfahrt e.V. | 837 |
2 |
| Eco Factory Co., Ltd. | 24 |
2 |
| LGL France | 3 |
2 |
| Liebherr-Aerospace Toulouse SAS | 162 |
2 |
| Lochinvar, LLC | 113 |
2 |
| Paragon Space Development Corporation | 51 |
2 |
| Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. | 156 |
2 |
| The University of Tokyo | 4369 |
2 |
| Other owners | 73 |