- 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: 1088
10-year publication summary
|
78
|
94
|
101
|
68
|
75
|
82
|
81
|
64
|
53
|
14
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Tokuyama Corporation | 1456 |
91 |
| Transitions Optical, Inc. | 246 |
39 |
| Ricoh Company, Ltd. | 13299 |
35 |
| Transitions Optical Limited | 173 |
29 |
| Hoya Lens Thailand Ltd. | 597 |
28 |
| Gentex Corporation | 1944 |
27 |
| The Pilot Ink Co., Ltd. | 88 |
24 |
| Essilor International (compagnie Generale D'optique) | 2966 |
23 |
| Vitro Flat Glass LLC | 499 |
21 |
| Kabushiki Kaisha Pilot Corporation | 343 |
20 |
| Canon Inc. | 42342 |
19 |
| Siemens AG | 24199 |
16 |
| FUJIFILM Corporation | 30277 |
16 |
| Mitsui Chemicals, Inc. | 3219 |
16 |
| University of South Florida | 1870 |
14 |
| LG Chem, Ltd. | 17840 |
11 |
| National Institute for Materials Science | 1089 |
11 |
| Rodenstock GmbH | 391 |
10 |
| Ambilight Inc. | 28 |
9 |
| Lannray Advanced Materials Co. Ltd | 15 |
9 |
| Other owners | 620 |