Average Co-Inventor Count = 7.20
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. Seiko Epson Corporation (2 from 33,490 patents)
2 patents:
1. 5453770 - On-demand type ink jet print head
2. 5409530 - Hot-melt ink composition