Average Co-Inventor Count = 2.25
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. View-Master International Group (2 from 6 patents)
2. Gaf Corporation (1 from 498 patents)
3 patents:
1. D268589 - Slide viewer
2. D268590 - Tabletop slide viewer
3. D264344 - Hand held transparency projector