Average Co-Inventor Count = 5.83
ph-index = 2
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Otis Elevator Company (2 from 2,619 patents)
2 patents:
1. 7299896 - Elevator system having drive motor located adjacent to hoistway door
2. 6305499 - Drum drive elevator using flat belt