- All sections
- B - Performing operations; transporting
- B66B - Elevators; escalators or moving walkways
- B66B 21/04 - Escalators linear type
Patent holdings for IPC class B66B 21/04
Total number of patents in this class: 49
10-year publication summary
|
4
|
2
|
2
|
8
|
6
|
8
|
10
|
2
|
3
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Otis Elevator Company | 2677 |
22 |
| Inventio AG | 2314 |
5 |
| Kone Oyj | 2000 |
4 |
| Mitsubishi Electric Corporation | 43934 |
3 |
| China University of Mining and Technology | 1189 |
2 |
| Siemens AG | 24990 |
1 |
| Toyota Motor Corporation | 28582 |
1 |
| Hitachi, Ltd. | 16452 |
1 |
| Brunswick Corporation | 1271 |
1 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3515 |
1 |
| Shanghai Hongqu Electronic Technology Co., Ltd. | 16 |
1 |
| Toshiba Elevator Kabushiki Kaisha | 101 |
1 |
| The University of Tokyo | 3903 |
1 |
| KONE Elevator Co., Ltd. | 8 |
1 |
| Hanson Lift (Suzhou) Co., Ltd. | 8 |
1 |
| Siemens Logistics GmbH | 41 |
1 |
| TK Elevator Innovation and Operations GmbH | 158 |
1 |
| Space Engineering Inc. | 2 |
1 |
| Other owners | 0 |