Average Co-Inventor Count = 3.00
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. Ciba-geigy Corporation (4 from 6,850 patents)
4 patents:
1. 5424452 - Diketopyrrolopyrroles and pigments thereof
2. 5342955 - Diketopyrrolopyrroles
3. 5238984 - Dianthraquinonyl compounds
4. 5200528 - Diketopyrrolopyrroles