Average Co-Inventor Count = 1.71
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. (3 from 233 patents)
3 patents:
1. 11450239 - Foldable article with sliceform
2. 9555660 - Reversible-hinge greeting card with dual-activated electronics
3. 9501956 - Combination greeting card and gift card presenter