- All sections
- H - Electricity
- H01R - Electrically-conductive connectionsstructural associations of a plurality of mutually-insulated electrical connecting elementscoupling devicescurrent collectors
- H01R 39/56 - Devices for lubricating or polishing slip-rings or commutators during operation of the collector
Patent holdings for IPC class H01R 39/56
Total number of patents in this class: 20
10-year publication summary
|
0
|
2
|
0
|
1
|
2
|
2
|
3
|
1
|
2
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schunk Carbon Technology GmbH | 40 |
8 |
| Schleifring und Apparatebau GmbH | 77 |
2 |
| Stemmann-Technik GmbH | 44 |
2 |
| Walter Maschinenbau GmbH | 52 |
2 |
| Illinois Tool Works Inc. | 11590 |
1 |
| Bayerische Motoren Werke Aktiengesellschaft | 14735 |
1 |
| Sumitomo Electric Toyama Co., Ltd. | 110 |
1 |
| Schleifring GmbH | 70 |
1 |
| Hitachi Industrial Products, Ltd. | 197 |
1 |
| Siemens Energy Global GmbH & Co. KG | 3096 |
1 |
| Other owners | 0 |