Average Co-Inventor Count = 4.00
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. Siemens Sgp Verkehrstechnik Gmbh (1 from 4 patents)
1 patent:
1. 6637348 - Level-adjustable main spring and actively biased emergency spring with fail-safe behavior