Average Co-Inventor Count = 7.00
ph-index = 1
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. (1 from 42,485 patents)
2. Hitachi Microcomputer Engineering, Ltd. (1 from 149 patents)
3. Hitachi Tokyo Electronics Co., Ltd. (1 from 21 patents)
1 patent:
1. 5031821 - Semiconductor integrated circuit device, method for producing or