Average Co-Inventor Count = 1.00
ph-index = 1
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. Durst Ag Fabrik Fototechnischer Apparate (2 from 16 patents)
2 patents:
1. D260773 - Photographic enlarging apparatus
2. 4227804 - Illuminating apparatus with a light control channel for photographic