Average Co-Inventor Count = 2.25
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. Zahnradfabrik Friedrichshafen, Ag. (2 from 416 patents)
2. Zf Friedrichshafen Ag (1 from 3,437 patents)
3 patents:
1. 5871415 - Helically cut planetary gear
2. 5005437 - Device for cleaning lubricating oil in a gearbox
3. 4687081 - Locking synchronization for gear shift