Average Co-Inventor Count = 5.00
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. Perry Equipment Corporation (2 from 25 patents)
2 patents:
1. 5893956 - Method of making a filter element
2. 5827430 - Coreless and spirally wound non-woven filter element