Average Co-Inventor Count = 3.00
ph-index = 7
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. Sony Corporation (9 from 58,130 patents)
9 patents:
1. 6424790 - Video tape recorder having control head upstream of erase head
2. 6341047 - AV data base for VTR
3. 6018613 - Disc player that reinitializes when a disc is ejected
4. 5907446 - Video tape recorder for recording management data on video tape
5. 5745640 - AV data base for VTR
6. 5430553 - Disc reproducing apparatus
7. 5396340 - Optical disc reproducing apparatus having displaying made control key
8. 5365502 - Optical disc player having a resume function
9. 5331423 - Disc player with an automatic initialization function