Average Co-Inventor Count = 3.55
ph-index = 4
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 (3 from 3,438 patents)
2. Zahnradfabrik Friedrichshafen, Ag. (1 from 416 patents)
4 patents:
1. 5878630 - Gear box control cooling
2. 5549184 - Hydrodynamic converter with a bridging coupling
3. 5474480 - Control system for operating the drive assembly of a ship
4. 5336120 - Control system for operating a ship's motive installation