Average Co-Inventor Count = 2.25
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. Zahnradfabrik Friedrichshafen, Ag. (2 from 416 patents)
2. Zf Friedrichshafen Ag (1 from 3,437 patents)
3 patents:
1. 5711395 - Rotary slide valve for power-assisted steering mechanisms of motor
2. 5138896 - Steering gear, especially for motor vehicles
3. 5080186 - Servo-assisted steering system for motor vechicles