Average Co-Inventor Count = 1.85
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. Zf Friedrichshafen Ag (2 from 3,430 patents)
2. Zahnradfabrik Friedrichshafen, Ag. (2 from 416 patents)
4 patents:
1. 6035740 - Steering column of a motor vehicle
2. 5450916 - Power-assisted steering device
3. 4979405 - Rack-type steering gear, particularly for use in motor vehicles
4. 3940192 - Housing flange for worm gear bearings