- 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: 160
10-year publication summary
|
13
|
12
|
8
|
12
|
20
|
20
|
12
|
10
|
15
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hamamatsu Photonics K.K. | 4313 |
27 |
| KLA-Tencor Corporation | 2550 |
14 |
| Photo Electron Soul Inc. | 31 |
11 |
| Photonis France | 53 |
9 |
| Elbit Systems of America, LLC | 190 |
6 |
| Hitachi High-Tech Corporation | 5082 |
6 |
| Arizona Board of Regents on behalf of Arizona State University | 2469 |
3 |
| National University Corporation Nagoya University | 889 |
3 |
| National University Corporation Shizuoka University | 384 |
3 |
| Radiation Monitoring Devices, Inc. | 88 |
3 |
| Technical University of Denmark | 159 |
3 |
| Triad National Security, LLC | 596 |
3 |
| KLA Corporation | 1406 |
3 |
| EOTech, LLC | 72 |
3 |
| International Business Machines Corporation | 60224 |
2 |
| Centre National de La Recherche Scientifique | 10140 |
2 |
| ASML Netherlands B.V. | 7190 |
2 |
| The United States of America as represented by the Secretary of the Navy | 2726 |
2 |
| The Board of Trustees of the Leland Stanford Junior University | 6259 |
2 |
| Brookhaven Science Associates, LLC | 197 |
2 |
| Other owners | 51 |