Average Co-Inventor Count = 1.71
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. Vsi International Inc. (4 from 4 patents)
4 patents:
1. D342317 - Vision tester
2. D337338 - Display hanger for eyeglasses
3. D336484 - Display hanger for eyeglasses
4. 5141104 - Hanger for displaying eyeglasses