Average Co-Inventor Count = 6.00
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. D549130 - Plush advent tree
2. 7211305 - Holiday countdown interactive display
3. D528037 - Plush advent tree