Average Co-Inventor Count = 2.44
ph-index = 4
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 (6 from 83 patents)
2. Zeiss Ikon Ag (1 from 12 patents)
7 patents:
1. D294005 - Key or similar article
2. D253475 - Photographic camera
3. D251975 - Photographic camera
4. D246786 - Motion picture camera
5. D246787 - Motion picture camera
6. D243082 - Electronic flash unit
7. D242617 - Motion picture camera