- All sections
- H - Electricity
- H01T - Spark gapsovervoltage arresters using spark gapssparking plugscorona devicesgenerating ions to be introduced into non-enclosed gases
- H01T 21/02 - Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs of sparking plugs
Patent holdings for IPC class H01T 21/02
Total number of patents in this class: 480
10-year publication summary
|
37
|
51
|
53
|
37
|
34
|
19
|
28
|
15
|
13
|
9
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Niterra Co., Ltd. | 1318 |
88 |
| NGK Spark Plug Co., Ltd. | 888 |
85 |
| Robert Bosch GmbH | 42887 |
61 |
| Denso Corporation | 24601 |
32 |
| Federal-Mogul Ignition GmbH | 54 |
28 |
| Wilmington Trust, National Association, AS Co-collateral Trustee, Successor Collateral Trustee | 117 |
27 |
| Federal-Mogul Ignition LLC | 80 |
26 |
| Federal-Mogul Ignition Company | 94 |
20 |
| Federal-Mogul Motorparts LLC | 431 |
19 |
| Jefferies Finance LLC | 188 |
12 |
| DKT Verwaltungs-GmbH | 15 |
5 |
| Tanaka Kikinzoku Kogyo K.K. | 584 |
5 |
| Federal-Mogul LLC | 103 |
5 |
| Innio Jenbacher GmbH & Co og | 274 |
5 |
| DENSO International America, Inc. | 626 |
4 |
| Caterpillar Inc. | 9673 |
4 |
| FRAM Group IP LLC | 121 |
4 |
| Tenneco Inc | 79 |
4 |
| Johnson Matthey Public Limited Company | 1876 |
3 |
| BERU AG | 20 |
2 |
| Other owners | 41 |