- 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 21/00 - Projectors or projection-type viewers; Accessories therefor
Patent holdings for IPC class G03B 21/00
Total number of patents in this class: 3944
10-year publication summary
|
337
|
353
|
370
|
410
|
303
|
250
|
199
|
175
|
149
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Seiko Epson Corporation | 18975 |
373 |
| Sony Corporation | 31565 |
255 |
| FUJIFILM Corporation | 28506 |
163 |
| Panasonic Intellectual Property Management Co., Ltd. | 29620 |
160 |
| NEC Display Solutions, Ltd. | 803 |
134 |
| Appotronics Corporation Limited | 1112 |
98 |
| NEC Corporation | 34337 |
78 |
| Ricoh Company, Ltd. | 13205 |
64 |
| Sony Group Corporation | 12575 |
64 |
| Coretronic Corporation | 1228 |
63 |
| Maxell, Ltd. | 2649 |
60 |
| Konica Minolta, Inc. | 8519 |
56 |
| Dolby Laboratories Licensing Corporation | 4046 |
54 |
| JVC Kenwood Corporation | 2917 |
53 |
| Sharp NEC Display Solutions, Ltd. | 500 |
50 |
| 3m Innovative Properties Company | 17955 |
44 |
| Casio Computer Co., Ltd. | 3372 |
41 |
| Canon Inc. | 38071 |
39 |
| Panasonic Corporation | 20327 |
34 |
| Sharp Kabushiki Kaisha | 18871 |
33 |
| Other owners | 2028 |