Average Co-Inventor Count = 7.00
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. Philip Morris Inc. (2 from 759 patents)
2 patents:
1. 5622190 - Concentric smoking filter having cellulose acetate tow periphery and
2. 5365951 - Concentric smoking filter having cellulose acetate tow periphery and