Average Co-Inventor Count = 4.00
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. Fujitsu Corporation (3 from 39,230 patents)
3 patents:
1. 6646966 - Automatic storage medium identifying method and device, automatic music CD identifying method and device, storage medium playback method and device, and storage medium as music CD
2. 6288991 - Storage medium playback method and device
3. 5880388 - Karaoke system for synchronizing and reproducing a performance data, and