Average Co-Inventor Count = 5.00
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. Hitachi, Ltd. (2 from 42,508 patents)
2 patents:
1. 5268776 - System for partially erasing thermally written liquid crystal element
2. 4964719 - Control method of brightness of screen used for projection display and