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. American Navigations Systems, Inc. (1 from 1 patent)
2. American Navigation Systems, Inc. (1 from 1 patent)
2 patents:
1. 5987380 - Hand-held GPS-mapping device
2. 5902347 - Hand-held GPS-mapping device