- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F28F - Details of heat-exchange or heat-transfer apparatus, of general application
- F28F 1/36 - 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 obliquely the means being helically-wound fins or wire spirals
Patent holdings for IPC class F28F 1/36
Total number of patents in this class: 168
10-year publication summary
|
17
|
20
|
21
|
21
|
8
|
8
|
15
|
9
|
4
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Wieland-Werke AG | 345 |
23 |
| Evapco, Inc. | 288 |
6 |
| Mitsubishi Electric Corporation | 45693 |
5 |
| Henan New Kelong Electrical Appliances Co., Ltd | 4 |
4 |
| SPX Flow Technology Danmark A/S | 50 |
4 |
| General Electric Company | 13816 |
3 |
| Eberspaecher Exhaust Technology GmbH & Co. KG | 62 |
3 |
| Shell Internationale Research Maatschappij B.V. | 3544 |
2 |
| Denso Corporation | 24069 |
2 |
| Uop LLC | 4208 |
2 |
| China Petroleum & Chemical Corporation | 1861 |
2 |
| Clean Energy Technology Association, Inc. | 7 |
2 |
| Enterex America LLC | 4 |
2 |
| GEA Batignolles Technologies Thermiques | 8 |
2 |
| Golden Dragon Precise Copper Tube Group Inc. | 12 |
2 |
| Intellihot, Inc. | 132 |
2 |
| Sumitomo Riko Company Limited | 1043 |
2 |
| The University of Tokyo | 4131 |
2 |
| Wolverine Tube, Inc. | 19 |
2 |
| King Mongkut's University of Technology Thonburi | 6 |
2 |
| Other owners | 94 |