Average Co-Inventor Count = 3.75
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. Donaldson Comapny, Inc. (2 from 1,404 patents)
2 patents:
1. 5954849 - Filter element
2. 5803941 - Filter element