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. Nisca Corporation (2 from 489 patents)
2 patents:
1. 5729359 - Image reading apparatus
2. D351378 - Light radiation reader for a light permeable document