- All sections
- G - Physics
- G03B - Apparatus or arrangements for taking photographs or for projecting or viewing them; apparatus or arrangements employing analogous techniques using waves other than optical waves; accessories therefor
- G03B 21/56 - Projection screens
Patent holdings for IPC class G03B 21/56
Total number of patents in this class: 812
10-year publication summary
|
59
|
79
|
75
|
70
|
80
|
75
|
64
|
52
|
26
|
6
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Appotronics Corporation Limited | 1111 |
39 |
| RealD Inc. | 260 |
33 |
| Dolby Laboratories Licensing Corporation | 3883 |
26 |
| Seiko Epson Corporation | 18724 |
25 |
| Hisense Laser Display Co., Ltd. | 315 |
20 |
| IMAX Theatres International Limited | 81 |
15 |
| Maxell, Ltd. | 2533 |
15 |
| Disney Enterprises, Inc. | 6012 |
13 |
| Sony Corporation | 32931 |
13 |
| CJ CGV Co., Ltd. | 78 |
13 |
| Draper, Inc. | 70 |
13 |
| Boe Technology Group Co., Ltd. | 35384 |
12 |
| Maxell Holdings, Ltd. | 1422 |
11 |
| Prysm Systems, Inc. | 87 |
11 |
| Samsung Electronics Co., Ltd. | 131630 |
10 |
| 3m Innovative Properties Company | 18406 |
10 |
| LG Electronics Inc. | 69257 |
10 |
| Barco N.V. | 478 |
9 |
| Coretronic Corporation | 1165 |
9 |
| Saint-Gobain Glass France | 3641 |
9 |
| Other owners | 496 |