- All sections
- G - Physics
- G03B - Apparatus or arrangements for taking photographs or for projecting or viewing themapparatus or arrangements employing analogous techniques using waves other than optical wavesaccessories therefor
- G03B 21/28 - Reflectors in projection beam
Patent holdings for IPC class G03B 21/28
Total number of patents in this class: 1364
10-year publication summary
|
109
|
90
|
147
|
145
|
118
|
98
|
81
|
61
|
54
|
29
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Seiko Epson Corporation | 19398 |
128 |
| FUJIFILM Corporation | 29437 |
78 |
| Ricoh Company, Ltd. | 13283 |
76 |
| Coretronic Corporation | 1284 |
50 |
| Maxell, Ltd. | 2804 |
43 |
| Maxell Holdings, Ltd. | 1306 |
42 |
| Sony Corporation | 31025 |
32 |
| 3m Innovative Properties Company | 17823 |
30 |
| Panasonic Intellectual Property Management Co., Ltd. | 31562 |
27 |
| Texas Instruments Incorporated | 19443 |
22 |
| Casio Computer Co., Ltd. | 3431 |
21 |
| Appotronics Corporation Limited | 1115 |
20 |
| Dolby Laboratories Licensing Corporation | 4135 |
20 |
| Young Optics Inc. | 256 |
18 |
| Iview Displays (Shenzhen) Company Ltd. | 186 |
16 |
| NEC Corporation | 35778 |
14 |
| Delta Electronics, Inc. | 2620 |
14 |
| Google LLC | 42333 |
14 |
| Qisda Corporation | 474 |
14 |
| LG Electronics Inc. | 73344 |
13 |
| Other owners | 672 |