- 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: 1097
10-year publication summary
|
78
|
94
|
101
|
68
|
75
|
84
|
82
|
64
|
53
|
34
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Tokuyama Corporation | 1506 |
93 |
| Ricoh Company, Ltd. | 13413 |
35 |
| Transitions Optical, Inc. | 231 |
34 |
| Hoya Lens Thailand Ltd. | 646 |
29 |
| Gentex Corporation | 1980 |
28 |
| Transitions Optical Limited | 178 |
28 |
| The Pilot Ink Co., Ltd. | 86 |
25 |
| Vitro Flat Glass LLC | 523 |
25 |
| Essilor International (compagnie Generale D'optique) | 3001 |
24 |
| Kabushiki Kaisha Pilot Corporation | 362 |
21 |
| Canon Inc. | 44490 |
19 |
| FUJIFILM Corporation | 30808 |
16 |
| Mitsui Chemicals, Inc. | 3288 |
16 |
| University of South Florida | 1913 |
14 |
| Siemens AG | 23934 |
13 |
| LG Chem, Ltd. | 17986 |
11 |
| National Institute for Materials Science | 1092 |
11 |
| Rodenstock GmbH | 400 |
10 |
| Ambilight Inc. | 27 |
9 |
| Lannray Advanced Materials Co. Ltd | 17 |
9 |
| Other owners | 627 |