Average Co-Inventor Count = 8.86
ph-index = 4
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 (8 from 423 patents)
8 patents:
1. 8950093 - Electronic greeting cards
2. 8448361 - Motion greeting cards
3. 8374878 - Audio envelopes
4. 8322058 - Telescoping greeting cards with activated sound or light or mechanical functions
5. 8312651 - Electronic greeting cards
6. 8230624 - Motion greeting cards
7. 8176663 - Electronic greeting cards and novelties with moveable elements and manual electronic circuit activation
8. 7802386 - Electronic greeting cards