Average Co-Inventor Count = 3.00
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. Vistac Gmbh (1 from 1 patent)
1 patent:
1. 6489605 - Device to aid the orientation of blind and partially sighted people