Average Co-Inventor Count = 5.33
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. Hitachi Microcomputer Engineering, Ltd. (1 from 149 patents)
2 patents:
1. 5378904 - Semiconductor integrated circuit and method and system for designing
2. 5159664 - Graphic display apparatus