Average Co-Inventor Count = 1.20
ph-index = 3
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. Johnson Matthey & Co., Limited (3 from 106 patents)
3 patents:
1. 4304808 - Printing ink
2. 4049484 - Vacuum transfer head and method of use
3. 4018728 - Printing ink