- 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: 1084
10-year publication summary
|
69
|
78
|
94
|
101
|
68
|
75
|
83
|
80
|
64
|
36
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Tokuyama Corporation | 1383 |
92 |
| Transitions Optical, Inc. | 256 |
40 |
| Ricoh Company, Ltd. | 13247 |
35 |
| Transitions Optical Limited | 160 |
28 |
| Hoya Lens Thailand Ltd. | 546 |
26 |
| The Pilot Ink Co., Ltd. | 90 |
25 |
| Gentex Corporation | 1890 |
24 |
| Essilor International (compagnie Generale D'optique) | 3000 |
23 |
| Siemens AG | 24520 |
21 |
| Kabushiki Kaisha Pilot Corporation | 333 |
21 |
| Vitro Flat Glass LLC | 457 |
20 |
| Canon Inc. | 39713 |
19 |
| FUJIFILM Corporation | 29305 |
16 |
| Mitsui Chemicals, Inc. | 3222 |
16 |
| University of South Florida | 1817 |
14 |
| LG Chem, Ltd. | 17598 |
11 |
| National Institute for Materials Science | 1105 |
11 |
| Rodenstock GmbH | 383 |
10 |
| PPG Industries Ohio, Inc. | 3457 |
9 |
| Ambilight Inc. | 28 |
9 |
| Other owners | 614 |