Average Co-Inventor Count = 7.47
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 42,485 patents)
2 patents:
1. 6570580 - Apparatus and method for information display
2. 6462794 - Image forming unit, enlarging unit, optical parts, and image display apparatus having these components