- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 37/073 - Electron guns using field emission, photo emission, or secondary emission electron sources
Patent holdings for IPC class H01J 37/073
Total number of patents in this class: 353
10-year publication summary
|
20
|
15
|
28
|
36
|
31
|
29
|
39
|
38
|
25
|
11
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi High-Tech Corporation | 5374 |
47 |
| Photo Electron Soul Inc. | 32 |
28 |
| Hitachi High-Technologies Corporation | 2001 |
20 |
| KLA-Tencor Corporation | 2544 |
19 |
| KLA Corporation | 1605 |
17 |
| ASML Netherlands B.V. | 7441 |
15 |
| ICT Integrated Circuit Testing Gesellschaft für Halbleiterprüftechnik mbH | 157 |
11 |
| National Institute for Materials Science | 1105 |
9 |
| NuFlare Technology, Inc. | 858 |
8 |
| National Institute of Advanced Industrial Science and Technology | 3793 |
7 |
| Denki Kagaku Kogyo Kabushiki Kaisha | 625 |
7 |
| Nikon Corporation | 7265 |
6 |
| Centre National de La Recherche Scientifique | 10531 |
5 |
| Applied Materials, Inc. | 18892 |
5 |
| 38th Research Institute, China Electronics Technology Group Corporation | 50 |
5 |
| FEI Company | 952 |
5 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10946 |
4 |
| Hamamatsu Photonics K.K. | 4448 |
4 |
| Board of Trustees of Michigan State University | 1192 |
4 |
| JEOL Ltd. | 594 |
4 |
| Other owners | 123 |