- All sections
- B - Performing operations; transporting
- B66B - Elevators; escalators or moving walkways
- B66B 13/28 - Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers between car or cage and wells
Patent holdings for IPC class B66B 13/28
Total number of patents in this class: 54
10-year publication summary
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1
|
5
|
2
|
4
|
6
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8
|
8
|
6
|
3
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0
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| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Otis Elevator Company | 2677 |
13 |
| Kone Oyj | 2000 |
11 |
| Inventio AG | 2314 |
7 |
| Mitsubishi Electric Corporation | 43934 |
6 |
| Hitachi, Ltd. | 16452 |
3 |
| VIP Lift & Escalator Services Limited | 2 |
2 |
| MITSUBISHI DENKI KABUSHIKI KAISHA also trading as Mitsubishi Electric Corporation | 1082 |
2 |
| DAe Ryoon Eles. | 5 |
2 |
| China University of Mining and Technology | 1189 |
1 |
| Dongnan Elevator Co., Ltd. | 25 |
1 |
| Mitsubishi Electric Building Techno-Service Co., Ltd. | 427 |
1 |
| Toshiba Elevator Kabushiki Kaisha | 101 |
1 |
| Thomsen, Christian E. | 6 |
1 |
| Societe Lyonnaise de Construction de Materiel D'ascenseur - Slycma | 1 |
1 |
| thyssenkrupp Elevator Innovation and Operations GmbH | 59 |
1 |
| TK Elevator Innovation and Operations GmbH | 158 |
1 |
| Other owners | 0 |