Average Co-Inventor Count = 6.86
ph-index = 2
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 (1 from 3,438 patents)
2. Zahnradfabrik Friedrichshafen, Ag. (1 from 416 patents)
2 patents:
1. 5474480 - Control system for operating the drive assembly of a ship
2. 5336120 - Control system for operating a ship's motive installation