- 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 21/18 - Fire preventing or extinguishing
Patent holdings for IPC class G03B 21/18
Total number of patents in this class: 69
10-year publication summary
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0
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0
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1
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0
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0
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0
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0
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0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Seiko Epson Corporation | 20327 |
22 |
| Panasonic Projector & Display Corporation | 487 |
10 |
| Coretronic Corporation | 1374 |
5 |
| Qisda Corporation | 512 |
4 |
| Canon Inc. | 44011 |
3 |
| Casio Computer Co., Ltd. | 3493 |
3 |
| Delta Electronics, Inc. | 2845 |
3 |
| Samsung Electronics Co., Ltd. | 158337 |
2 |
| Sony Corporation | 30128 |
2 |
| Ricoh Company, Ltd. | 13336 |
2 |
| Christie Digital Systems USA, Inc. | 168 |
2 |
| Young Green Energy Co. | 6 |
2 |
| Sharp NEC Display Solutions, Ltd. | 502 |
2 |
| The Boeing Company | 20176 |
1 |
| Sanyo Electric Co., Ltd. | 3399 |
1 |
| Dell Products L.P. | 17095 |
1 |
| Digital Projection Limited | 6 |
1 |
| Young Optics Inc. | 257 |
1 |
| Maxell Holdings, Ltd. | 1256 |
1 |
| Maxell, Ltd. | 3048 |
1 |
| Other owners | 0 |