Average Co-Inventor Count = 2.79
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. Hallmark Cards, Inc. (5 from 233 patents)
5 patents:
1. 9669978 - Gift card holder
2. 9421475 - Context-based interactive plush toy
3. 8911277 - Context-based interactive plush toy
4. 8898939 - Gift card holder
5. 8568189 - Context-based interactive plush toy