- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 27/409 - Oxygen concentration cells
Patent holdings for IPC class G01N 27/409
Total number of patents in this class: 481
10-year publication summary
|
39
|
38
|
33
|
36
|
62
|
57
|
45
|
45
|
31
|
7
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Denso Corporation | 23338 |
139 |
| NGK Insulators, Ltd. | 4589 |
120 |
| Niterra Co., Ltd. | 1122 |
53 |
| NGK Spark Plug Co., Ltd. | 935 |
42 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13301 |
11 |
| Robert Bosch GmbH | 40953 |
10 |
| Toyota Motor Corporation | 28582 |
7 |
| Hitachi, Ltd. | 16452 |
5 |
| Mitsui Mining & Smelting Co., Ltd. | 1373 |
5 |
| Osaka Gas Co., Ltd. | 312 |
4 |
| Tanaka Kikinzoku Kogyo K.K. | 589 |
4 |
| Yamaha Hatsudoki Kabushiki Kaisha | 1998 |
4 |
| Bosch Corporation | 404 |
3 |
| Rosemount Inc. | 1212 |
3 |
| Sumitomo Electric Fine Polymer, Inc. | 202 |
3 |
| Illinois Tool Works Inc. | 11152 |
2 |
| Honeywell International Inc. | 13799 |
2 |
| Sumitomo Electric Industries, Ltd. | 14131 |
2 |
| Kyocera Corporation | 12735 |
2 |
| Rohm Co., Ltd. | 5843 |
2 |
| Other owners | 58 |