Average Co-Inventor Count = 5.00
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. Ciba-Geigy Ag (2 from 595 patents)
2 patents:
1. 4118232 - Photographic material containing sulphonic acid group containing disazo
2. 4051123 - Sulfonic-acid-group containing disazo dyestuffs