Average Co-Inventor Count = 2.86
ph-index = 1
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 2,616 patents)
2 patents:
1. 11459207 - Safety link with pulley
2. 7413060 - Car fall-prevention apparatus