Average Co-Inventor Count = 4.00
ph-index = 1
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. 3m Innovative Properties Company (2 from 14,084 patents)
2 patents:
1. D575390 - Exhalation valve filter
2. D550837 - Frame that supports an exhalation valve filter