Average Co-Inventor Count = 3.21
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. Hallmark Cards, Inc. (6 from 233 patents)
6 patents:
1. 11499706 - Apparatus for producing light and sound
2. 11027571 - Recordable greeting card with user-definable touch zones
3. 10352553 - Apparatus for producing light and sound
4. 9713397 - Modular display frames and system for magnetically coupled arrangements
5. D782103 - Cover for an illumination device
6. D751828 - Picture frame