Average Co-Inventor Count = 8.00
ph-index = 1
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 (1 from 423 patents)
2. Rohm and Haas Company (3,391 patents)
1 patent:
1. 8322058 - Telescoping greeting cards with activated sound or light or mechanical functions