- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F28F - Details of heat-exchange or heat-transfer apparatus, of general application
- F28F 1/32 - 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 transversely the means having portions engaging further tubular elements
Patent holdings for IPC class F28F 1/32
Total number of patents in this class: 1161
10-year publication summary
|
99
|
101
|
101
|
95
|
67
|
71
|
67
|
59
|
48
|
30
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 48508 |
207 |
| Daikin Industries, Ltd. | 10546 |
130 |
| LG Electronics Inc. | 76328 |
41 |
| Denso Corporation | 25909 |
30 |
| Samsung Electronics Co., Ltd. | 159755 |
26 |
| UACJ Corporation | 743 |
25 |
| Panasonic Corporation | 18572 |
23 |
| Panasonic Intellectual Property Management Co., Ltd. | 34685 |
22 |
| Kyungdong Navien Co., Ltd. | 649 |
21 |
| Carrier Corporation | 3958 |
20 |
| Valeo Systemes Thermiques | 2819 |
19 |
| Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. | 162 |
18 |
| Hitachi-johnson Controls Air Conditioning, Inc. | 511 |
13 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2845 |
12 |
| Kyoshin Kogyo Co., Ltd. | 26 |
11 |
| Trane International Inc. | 1245 |
11 |
| The University of Tokyo | 4409 |
11 |
| Asia Vital Components Co., Ltd. | 433 |
10 |
| Hidaka Seiki Kabushiki Kaisha | 58 |
10 |
| Rheem Manufacturing Company | 1038 |
10 |
| Other owners | 491 |