Average Co-Inventor Count = 3.00
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. Instron Limited (2 from 22 patents)
2 patents:
1. 6142010 - Penetration hardness tester
2. 5616857 - Penetration hardness tester