Average Co-Inventor Count = 2.40
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. Ferraris Development and Engineering Company Limited (2 from 8 patents)
2 patents:
1. 5253651 - Ventilatory instrument for measuring peak expiratory flow
2. D333004 - Ventilatory instrument for measuring peak expiratory flow