Average Co-Inventor Count = 4.00
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 33,404 patents)
2. Nippon Chemical Industrial (1 from 1 patent)
2 patents:
1. 5708049 - Colored contact lens and method for producing the same
2. 5520910 - Antimicrobial polymer, contact lens and contact lens-care articles