Average Co-Inventor Count = 3.00
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. (3 from 416 patents)
3 patents:
1. 5107752 - Rotary gate valve for hydraulic servo-assisted steering systems
2. 5086687 - Rotary slide valve for hydraulic auxiliary power steering
3. 4848402 - Rotary slide valve for hydraulic auxiliary power steerings