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. Pelikan Aktiengesellschaft (3 from 50 patents)
3 patents:
1. 5135798 - Multilayer, flexible transfer strip
2. 4891260 - Multilayer flexible transfer ribbon
3. 4871620 - Typewriter ribbon having a thin support and a transferable mass, for