Average Co-Inventor Count = 4.00
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. Navigation Technologies Corporation (1 from 127 patents)
2. Navteq North America, LLC (1 from 122 patents)
2 patents:
1. 6836724 - Navigation system with sign assistance
2. 6671615 - Navigation system with sign assistance