Average Co-Inventor Count = 3.00
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. Bell + Howell Company (2 from 502 patents)
2 patents:
1. D260096 - Microfilm reader
2. 4217039 - Microfiche viewer with rotatable base