Average Co-Inventor Count = 5.87
ph-index = 3
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 (3 from 2,614 patents)
3 patents:
1. 6848543 - Single wall interface traction elevator
2. 6193018 - Belt-climbing elevator having drive in counterweight
3. 6138799 - Belt-climbing elevator having drive in counterweight