Average Co-Inventor Count = 10.00
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 42,488 patents)
2. Hitachi Computer Peripherals Co., Ltd. (1 from 66 patents)
1 patent:
1. 4803572 - Recording/reproducing method and apparatus of magnetic disk unit in