Average Co-Inventor Count = 3.60
ph-index = 3
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. Hallmark Cards, Inc. (3 from 233 patents)
3 patents:
1. 7975411 - Card for retaining items therein
2. 7827710 - Card for retaining items therein
3. 7204048 - Card for retaining items therein