Average Co-Inventor Count = 2.00
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 3,428 patents)
3 patents:
1. 5779588 - Drive for lifting equipment
2. 5251878 - Drive for lifting equipment
3. 5009126 - Hydrostatic-mechanical drive system