Average Co-Inventor Count = 2.00
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. Publications International, Ltd. (2 from 6 patents)
2 patents:
1. 6041215 - Method for making an electronic book for producing audible sounds in
2. 5803748 - Apparatus for producing audible sounds in response to visual indicia