- All sections
- C - Chemistry; metallurgy
- C09K - Materials for applications not otherwise provided for; applications 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: 1052
10-year publication summary
|
59
|
69
|
78
|
94
|
101
|
67
|
75
|
81
|
74
|
17
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Tokuyama Corporation | 1248 |
80 |
| Transitions Optical, Inc. | 317 |
60 |
| Ricoh Company, Ltd. | 13266 |
35 |
| Siemens AG | 24990 |
28 |
| The Pilot Ink Co., Ltd. | 95 |
26 |
| Transitions Optical Limited | 133 |
25 |
| Gentex Corporation | 1742 |
23 |
| Essilor International (compagnie Generale D'optique) | 2918 |
21 |
| Kabushiki Kaisha Pilot Corporation | 321 |
21 |
| Hoya Lens Thailand Ltd. | 447 |
19 |
| Canon Inc. | 36841 |
17 |
| FUJIFILM Corporation | 27102 |
15 |
| Mitsui Chemicals, Inc. | 3134 |
15 |
| Vitro Flat Glass LLC | 419 |
15 |
| University of South Florida | 1817 |
14 |
| LG Chem, Ltd. | 17205 |
12 |
| Furcifer Inc. | 37 |
10 |
| National Institute for Materials Science | 1108 |
10 |
| Rodenstock GmbH | 356 |
10 |
| BASF SE | 19740 |
8 |
| Other owners | 588 |