- All sections
- H - Electricity
- H01H - Electric switchesrelaysselectorsemergency protective devices
- H01H 51/28 - Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
Patent holdings for IPC class H01H 51/28
Total number of patents in this class: 35
10-year publication summary
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3
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5
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6
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4
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6
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1
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0
|
1
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2
|
1
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| TDK Electronics AG | 1014 |
5 |
| Littelfuse, Inc. | 791 |
4 |
| Robert Bosch GmbH | 44291 |
2 |
| Microsemi Corporation | 111 |
2 |
| Guangdong Hua'chan Research Institute of Intelligent Transportation System Co., Ltd | 26 |
2 |
| Pro-Tech Inlab, Limited Liability Company | 4 |
2 |
| LG Chem, Ltd. | 17967 |
1 |
| Sumitomo Electric Industries, Ltd. | 16345 |
1 |
| GM Global Technology Operations LLC | 16219 |
1 |
| Panasonic Intellectual Property Management Co., Ltd. | 34403 |
1 |
| Albright International Limited | 5 |
1 |
| BSH Hausgeräte GmbH | 5655 |
1 |
| General Equipment and Manufacturing Company, Inc., d/b/a TopWorx, Inc. | 74 |
1 |
| Lsis Co., Ltd. | 815 |
1 |
| Nippon Electric Glass Co., Ltd. | 2564 |
1 |
| Sensata Technologies, Inc. | 438 |
1 |
| Shenzhen Zhiyou Battery Integration Technology Co., Ltd | 3 |
1 |
| Song Chuan Precision Co., Ltd. | 41 |
1 |
| Thomas & Betts International LLC | 373 |
1 |
| Xiamen Hongfa Electric Power Controls Co., Ltd. | 294 |
1 |
| Other owners | 4 |