Average Co-Inventor Count = 5.46
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. Rollei-werke Franke & Heidecke (2 from 83 patents)
2 patents:
1. D253475 - Photographic camera
2. D251975 - Photographic camera