- 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 21/22 - Soundproof bodies
Patent holdings for IPC class G03B 21/22
Total number of patents in this class: 72
10-year publication summary
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1
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1
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2
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2
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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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1
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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 | 20043 |
11 |
| Sanyo Electric Co., Ltd. | 3519 |
6 |
| Ricoh Company, Ltd. | 13303 |
5 |
| LG Electronics Inc. | 75160 |
3 |
| Konica Minolta Opto, Inc. | 950 |
3 |
| Coretronic Corporation | 1345 |
3 |
| Maxell Holdings, Ltd. | 1273 |
3 |
| Maxell, Ltd. | 2952 |
3 |
| Rakuten Group, Inc. | 1628 |
3 |
| Disney Enterprises, Inc. | 6256 |
2 |
| Apple Inc. | 58208 |
2 |
| FUJIFILM Corporation | 30296 |
2 |
| Texas Instruments Incorporated | 19628 |
2 |
| Dell Products L.P. | 16434 |
2 |
| Fujinon Corporation | 36 |
2 |
| Innovation Bureau AS | 2 |
2 |
| Qisda Corporation | 506 |
2 |
| SANYO Technology Center (Shenzhen) Co., Ltd. | 29 |
2 |
| Sharp NEC Display Solutions, Ltd. | 539 |
2 |
| Toshiba TEC Corporation | 3894 |
1 |
| Other owners | 11 |