- All sections
- G - Physics
- G21K - Techniques for handling particles or ionising radiation not otherwise provided for; irradiation devices; gamma ray or x-ray microscopes
- G21K 1/04 - Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using variable diaphragms, shutters, choppers
Patent holdings for IPC class G21K 1/04
Total number of patents in this class: 576
10-year publication summary
|
66
|
57
|
60
|
51
|
28
|
43
|
40
|
30
|
26
|
10
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Elekta AB (Publ) | 318 |
27 |
| Shanghai United Imaging Healthcare Co., Ltd. | 1569 |
26 |
| Koninklijke Philips N.V. | 22975 |
23 |
| General Electric Company | 18133 |
19 |
| Varian Medical Systems, Inc. | 850 |
18 |
| Accuray Incorporated | 408 |
16 |
| Siemens Healthineers AG | 5714 |
15 |
| Viken Detection Corporation | 57 |
13 |
| Elekta Limited | 178 |
12 |
| Deutsches Krebsforschungszentrum | 417 |
11 |
| Rapiscan Systems, Inc. | 300 |
11 |
| Toshiba Medical Systems Corporation | 2236 |
10 |
| ControlRad Systems, Inc. | 33 |
10 |
| Hologic, Inc. | 1047 |
10 |
| Nuctech Company Limited | 1275 |
10 |
| Mevion Medical Systems, Inc. | 102 |
9 |
| American Science and Engineering, Inc. | 112 |
8 |
| Siemens Healthineers International AG | 372 |
8 |
| Siemens AG | 24990 |
7 |
| Tsinghua University | 5426 |
7 |
| Other owners | 306 |