Average Co-Inventor Count = 4.50
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. Seiko Epson Corporation (3 from 33,418 patents)
3 patents:
1. 5607999 - Water-based recording ink
2. 5503664 - Ink compositions for ink jet printing
3. 5324349 - Ink compositions for ink jet printing