Average Co-Inventor Count = 1.50
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 (3 from 502 patents)
3 patents:
1. D247499 - Microfilm recorder or similar article
2. 3970385 - Microfilm recorder document transport system
3. 3960447 - Locating and locking mechanism for glass flat