- All sections
- C - Chemistrymetallurgy
- C09K - Materials for applications not otherwise provided forapplications of materials not otherwise provided for
- C09K 9/02 - Organic tenebrescent materials
Patent holdings for IPC class C09K 9/02
Total number of patents in this class: 1083
10-year publication summary
|
68
|
77
|
94
|
101
|
68
|
74
|
84
|
80
|
64
|
37
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Tokuyama Corporation | 1392 |
92 |
| Transitions Optical, Inc. | 255 |
40 |
| Ricoh Company, Ltd. | 13279 |
35 |
| Transitions Optical Limited | 159 |
28 |
| Hoya Lens Thailand Ltd. | 554 |
27 |
| The Pilot Ink Co., Ltd. | 89 |
25 |
| Gentex Corporation | 1893 |
24 |
| Essilor International (compagnie Generale D'optique) | 2996 |
23 |
| Kabushiki Kaisha Pilot Corporation | 332 |
21 |
| Siemens AG | 24477 |
20 |
| Vitro Flat Glass LLC | 463 |
20 |
| Canon Inc. | 39960 |
19 |
| FUJIFILM Corporation | 29399 |
16 |
| Mitsui Chemicals, Inc. | 3219 |
16 |
| University of South Florida | 1830 |
14 |
| LG Chem, Ltd. | 17638 |
11 |
| National Institute for Materials Science | 1105 |
11 |
| Rodenstock GmbH | 382 |
10 |
| PPG Industries Ohio, Inc. | 3453 |
9 |
| Ambilight Inc. | 28 |
9 |
| Other owners | 613 |