Average Co-Inventor Count = 2.00
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. Fina Research, S.a. (1 from 123 patents)
2. Joh. Enschede En Zonen Grafische Inrichting B.v. (1 from 3 patents)
2 patents:
1. 5728427 - Process for producing color cards
2. 4830902 - Paper object printed with ink and coated with a protective layer