- 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 21/20 - Lamp housings
Patent holdings for IPC class G03B 21/20
Total number of patents in this class: 4817
10-year publication summary
|
358
|
408
|
390
|
523
|
656
|
580
|
482
|
449
|
345
|
97
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Seiko Epson Corporation | 18724 |
606 |
| Coretronic Corporation | 1165 |
417 |
| Appotronics Corporation Limited | 1111 |
395 |
| Sony Corporation | 32931 |
182 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
163 |
| Casio Computer Co., Ltd. | 3343 |
157 |
| Hisense Laser Display Co., Ltd. | 315 |
154 |
| Ricoh Company, Ltd. | 13266 |
116 |
| Canon Inc. | 36841 |
91 |
| Sharp NEC Display Solutions, Ltd. | 493 |
88 |
| Delta Electronics, Inc. | 2401 |
84 |
| Dolby Laboratories Licensing Corporation | 3883 |
79 |
| Maxell, Ltd. | 2533 |
56 |
| Qisda Corporation | 392 |
55 |
| OSRAM GmbH | 2442 |
54 |
| Maxell Holdings, Ltd. | 1422 |
52 |
| Barco N.V. | 478 |
47 |
| Texas Instruments Incorporated | 19376 |
46 |
| Iview Displays (Shenzhen) Company Ltd. | 198 |
45 |
| FUJIFILM Corporation | 27102 |
38 |
| Other owners | 1892 |