- All sections
- G - Physics
- G02B - Optical elements, systems or apparatus
- G02B 23/20 - Collapsible housings
Patent holdings for IPC class G02B 23/20
Total number of patents in this class: 18
10-year publication summary
|
2
|
1
|
2
|
5
|
2
|
3
|
2
|
2
|
0
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hallmark Cards, Incorporated | 337 |
3 |
| Almalence, Inc. | 16 |
2 |
| Applied Invention, LLC | 59 |
2 |
| Utah State University Research Foundation | 30 |
2 |
| Panasonic Corporation | 20786 |
1 |
| Asia Optical Co., Inc. | 189 |
1 |
| Hoodman Corporation | 15 |
1 |
| King's College London | 493 |
1 |
| Sintai Optical (Shenzhen) Co., Ltd. | 209 |
1 |
| Southwest Research Institute | 791 |
1 |
| Troy Industries, Inc. | 48 |
1 |
| Vrez Innovation Inc. | 6 |
1 |
| BAE Systems Space & Mission Systems Inc. | 115 |
1 |
| Other owners | 0 |