Average Co-Inventor Count = 4.66
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. (4 from 233 patents)
4 patents:
1. 9934817 - System for recording, sharing, and storing audio
2. 9720640 - Multifunction button
3. 9449350 - Prompting service
4. 8819169 - Prompting service