- All sections
- H - Electricity
- H02K - Dynamo-electric machines
- H02K 21/44 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with armature windings wound upon the magnets
Patent holdings for IPC class H02K 21/44
Total number of patents in this class: 104
10-year publication summary
|
15
|
11
|
14
|
7
|
7
|
9
|
6
|
6
|
2
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Persimmon Technologies, Corp. | 152 |
5 |
| Daikin Industries, Ltd. | 10112 |
4 |
| Prototus, Ltd. | 13 |
4 |
| Siemens AG | 24346 |
3 |
| Wisconsin Alumni Research Foundation | 3885 |
3 |
| Hamilton Sundstrand Corporation | 4932 |
3 |
| Aktiebolaget SKF | 2999 |
3 |
| Magnomatics Limited | 63 |
3 |
| Massachusetts Development Finance Agency | 30 |
3 |
| Nagoya Institute of Technology | 233 |
3 |
| Salem Saqr Majed Bin Saqr Almarri | 3 |
3 |
| Saqr Majed Bin Saqr Al Marri | 3 |
3 |
| Mitsubishi Heavy Industries, Ltd. | 8823 |
2 |
| Massachusetts Institute of Technology | 10121 |
2 |
| Levitronix GmbH | 69 |
2 |
| QM Power, Inc. | 55 |
2 |
| Rensselaer Polytechnic Institute | 831 |
2 |
| Technische Universitat Berlin | 352 |
2 |
| U.S. Department of Energy | 231 |
2 |
| Venpower GmbH | 3 |
2 |
| Other owners | 48 |