Average Co-Inventor Count = 5.00
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. American Greetings Corporation (3 from 423 patents)
3 patents:
1. 8549776 - Flap sensor activated greeting cards
2. 8448360 - Flap sensor activated greeting cards
3. 8418384 - Pop-up musical greeting cards