Average Co-Inventor Count = 3.00
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. (2 from 42,485 patents)
2 patents:
1. 6704754 - Method for shared use of medium-exchangeable storage device for purposes of backup and file system, and medium-exchangeable recording system
2. 6400657 - Method of selecting medium in optical disk memory device and optical disk memory system