- 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: 3958
10-year publication summary
259
|
337
|
353
|
370
|
410
|
303
|
246
|
195
|
171
|
53
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Seiko Epson Corporation | 18724 |
385 |
Sony Corporation | 32931 |
263 |
FUJIFILM Corporation | 27102 |
154 |
Panasonic Intellectual Property Management Co., Ltd. | 27812 |
150 |
NEC Display Solutions, Ltd. | 822 |
134 |
Appotronics Corporation Limited | 1111 |
95 |
NEC Corporation | 32703 |
77 |
Ricoh Company, Ltd. | 13266 |
67 |
Coretronic Corporation | 1165 |
59 |
Maxell, Ltd. | 2533 |
59 |
Konica Minolta, Inc. | 8349 |
56 |
Sony Group Corporation | 10730 |
56 |
Dolby Laboratories Licensing Corporation | 3883 |
53 |
JVC Kenwood Corporation | 2774 |
49 |
Sharp NEC Display Solutions, Ltd. | 493 |
49 |
3m Innovative Properties Company | 18406 |
45 |
Casio Computer Co., Ltd. | 3343 |
44 |
Canon Inc. | 36841 |
40 |
Panasonic Corporation | 20786 |
39 |
Sharp Kabushiki Kaisha | 18957 |
37 |
Other owners | 2047 |