Average Co-Inventor Count = 2.90
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. (3 from 233 patents)
3 patents:
1. 4509825 - Directing and controlling the distribution of radiant energy
2. 4442942 - Carded merchandise display
3. 4305332 - Two web gravure dual impression cylinder proofing and sampling press and