- 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 21/20 - Lamp housings
Patent holdings for IPC class G03B 21/20
Total number of patents in this class: 5176
10-year publication summary
|
407
|
389
|
523
|
655
|
575
|
483
|
462
|
351
|
307
|
236
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Seiko Epson Corporation | 19664 |
664 |
| Coretronic Corporation | 1301 |
459 |
| Appotronics Corporation Limited | 1117 |
400 |
| Hisense Laser Display Co., Ltd. | 406 |
192 |
| Panasonic Intellectual Property Management Co., Ltd. | 32052 |
173 |
| Sony Corporation | 30921 |
171 |
| Casio Computer Co., Ltd. | 3452 |
156 |
| Ricoh Company, Ltd. | 13386 |
123 |
| Delta Electronics, Inc. | 2649 |
91 |
| Canon Inc. | 40509 |
88 |
| Sharp NEC Display Solutions, Ltd. | 528 |
87 |
| Dolby Laboratories Licensing Corporation | 4152 |
78 |
| Qisda Corporation | 484 |
69 |
| Maxell, Ltd. | 2833 |
57 |
| Signify Holding B.V. | 7629 |
56 |
| OSRAM GmbH | 2381 |
54 |
| Barco N.V. | 538 |
53 |
| Samsung Electronics Co., Ltd. | 147787 |
48 |
| Maxell Holdings, Ltd. | 1299 |
48 |
| Texas Instruments Incorporated | 19462 |
44 |
| Other owners | 2065 |