- 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 21/28 - Reflectors in projection beam
Patent holdings for IPC class G03B 21/28
Total number of patents in this class: 1379
10-year publication summary
|
109
|
90
|
148
|
146
|
121
|
98
|
81
|
61
|
54
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Seiko Epson Corporation | 18984 |
128 |
| FUJIFILM Corporation | 28555 |
77 |
| Ricoh Company, Ltd. | 13209 |
77 |
| Coretronic Corporation | 1232 |
49 |
| Maxell, Ltd. | 2655 |
46 |
| Maxell Holdings, Ltd. | 1359 |
45 |
| Sony Corporation | 31550 |
33 |
| 3m Innovative Properties Company | 17951 |
28 |
| Texas Instruments Incorporated | 19418 |
28 |
| Panasonic Intellectual Property Management Co., Ltd. | 29687 |
26 |
| Casio Computer Co., Ltd. | 3372 |
20 |
| Appotronics Corporation Limited | 1112 |
20 |
| Dolby Laboratories Licensing Corporation | 4052 |
20 |
| Young Optics Inc. | 256 |
19 |
| Iview Displays (Shenzhen) Company Ltd. | 186 |
16 |
| NEC Corporation | 34371 |
14 |
| Canon Inc. | 38114 |
14 |
| Delta Electronics, Inc. | 2507 |
14 |
| Google LLC | 40800 |
14 |
| Qisda Corporation | 421 |
14 |
| Other owners | 677 |