Average Co-Inventor Count = 5.14
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. D917417 - Phonograph greeting card
2. D905655 - Phonograph greeting card
3. 9044990 - Motorized gift package accessory