- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 1/34 - Photo-emissive cathodes
Patent holdings for IPC class H01J 1/34
Total number of patents in this class: 172
10-year publication summary
|
12
|
8
|
12
|
20
|
20
|
12
|
10
|
18
|
5
|
9
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hamamatsu Photonics K.K. | 4669 |
29 |
| KLA-Tencor Corporation | 2518 |
14 |
| Photo Electron Soul Inc. | 35 |
11 |
| Photonis France | 58 |
9 |
| Elbit Systems of America, LLC | 179 |
7 |
| Hitachi High-Tech Corporation | 5819 |
7 |
| L3Harris Technologies, Inc. | 363 |
6 |
| Arizona Board of Regents on behalf of Arizona State University | 2930 |
3 |
| National University Corporation Nagoya University | 787 |
3 |
| National University Corporation Shizuoka University | 383 |
3 |
| Photonis Netherlands B.V. | 33 |
3 |
| Radiation Monitoring Devices, Inc. | 83 |
3 |
| Technical University of Denmark | 153 |
3 |
| Triad National Security, LLC | 634 |
3 |
| KLA Corporation | 1844 |
3 |
| Photonics West, LLC | 22 |
3 |
| International Business Machines Corporation | 62621 |
2 |
| Centre National de La Recherche Scientifique | 11016 |
2 |
| ASML Netherlands B.V. | 7906 |
2 |
| The United States of America as represented by the Secretary of the Navy | 2856 |
2 |
| Other owners | 54 |