Average Co-Inventor Count = 5.62
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. American Greetings Corporation (3 from 423 patents)
3 patents:
1. 8726548 - Interactive greeting card
2. 8683721 - Greeting card with game
3. D664194 - Sweater shaped greeting card