- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F28F - Details of heat-exchange or heat-transfer apparatus, of general application
- F28F 1/38 - 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 being staggered to form tortuous fluid passages
Patent holdings for IPC class F28F 1/38
Total number of patents in this class: 25
10-year publication summary
|
4
|
4
|
3
|
2
|
0
|
2
|
1
|
1
|
2
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Safran Aero Boosters SA | 184 |
3 |
| DAe Myeong Eng Co., Ltd. | 3 |
3 |
| Mitsubishi Electric Corporation | 47131 |
2 |
| WSP Investment II BV | 5 |
2 |
| Mitsubishi Heavy Industries, Ltd. | 8931 |
1 |
| Delphi Technologies, Inc. | 419 |
1 |
| Daikin Industries, Ltd. | 10168 |
1 |
| Rolls-Royce PLC | 3166 |
1 |
| Mitsubishi Hitachi Power Systems, Ltd. | 991 |
1 |
| Rheem Manufacturing Company | 982 |
1 |
| SABIC Global Technologies B.V. | 4420 |
1 |
| Sulzer Management AG | 687 |
1 |
| Tyco Fire & Security GmbH | 3485 |
1 |
| The University of Tokyo | 4262 |
1 |
| Waki Factory Inc. | 9 |
1 |
| Hexsol Italy SRL | 8 |
1 |
| Encocam Limited | 7 |
1 |
| Transportation IP Holdings, LLC | 948 |
1 |
| Taylor Commercial Foodservice, LLC | 148 |
1 |
| Other owners | 0 |