- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 1/304 - Field-emissive cathodes
Patent holdings for IPC class H01J 1/304
Total number of patents in this class: 461
10-year publication summary
|
22
|
19
|
40
|
26
|
27
|
27
|
23
|
15
|
20
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Tsinghua University | 6211 |
36 |
| Hon Hai Precision Industry Co., Ltd. | 4022 |
35 |
| NCX Corporation | 39 |
21 |
| KLA-Tencor Corporation | 2518 |
16 |
| Meidensha Corporation | 929 |
11 |
| Samsung Electronics Co., Ltd. | 157719 |
10 |
| Electronics and Telecommunications Research Institute | 9672 |
10 |
| LightLab Sweden AB | 24 |
10 |
| Massachusetts Institute of Technology | 10251 |
8 |
| Denki Kagaku Kogyo Kabushiki Kaisha | 580 |
8 |
| E. I. du Pont de Nemours and Company | 3534 |
7 |
| National Institute for Materials Science | 1085 |
7 |
| Hitachi High-Tech Corporation | 5846 |
7 |
| Purefize Technologies AB | 32 |
7 |
| Hitachi High-Technologies Corporation | 1987 |
6 |
| ASML Netherlands B.V. | 7925 |
6 |
| National Institute of Advanced Industrial Science and Technology | 3794 |
6 |
| KLA Corporation | 1849 |
6 |
| Centre National de La Recherche Scientifique | 11023 |
5 |
| FEI Company | 1052 |
5 |
| Other owners | 234 |