Average Co-Inventor Count = 2.40
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. Hoffmann-la Roche Inc. (5 from 4,948 patents)
5 patents:
1. 4226774 - Carbazole melonates
2. 4193923 - Tetrahydro 2-carbazolyl methyl malonate derivatives
3. 4158007 - Carbazole methyl malonates
4. 4104367 - Radioimmunoassay for methadone
5. 4041040 - Ecgonine derivative