Average Co-Inventor Count = 1.80
ph-index = 9
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 (30 from 58,130 patents)
2. Keio University (340 patents)
30 patents:
1. D771009 - Speaker
2. D711925 - Disc player
3. D704679 - Speaker box
4. D683766 - Disc player
5. D681577 - Disc player
6. D661280 - Combine speaker box and amplifier
7. D613732 - Disc player
8. D585858 - Combined disc recorder and hard disc drive
9. D582868 - Combined disc recorder and hard disc drive
10. D580385 - Disc player
11. D578505 - Amplifier
12. D571755 - Disc player
13. D564996 - Disc player
14. D553591 - Disc player
15. D551688 - Video camera