Average Co-Inventor Count = 1.03
ph-index = 8
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. Yamaha Corporation (17 from 5,454 patents)
17 patents:
1. D1021866 - Earphone
2. D907108 - Electronic keyboard
3. D867440 - Electronic keyboard
4. D826315 - Electronic keyboard
5. D792921 - Electronic keyboard
6. D776189 - Electronic keyboard
7. D772974 - Electronic keyboard
8. D719609 - Electronic keyboard
9. D585478 - Electronic keyboard instrument
10. D561742 - Audio mixer
11. D527373 - Speaker
12. D510381 - Electronic keyboard instrument
13. RE37914 - Electronic keyboard musical instrument
14. D413617 - Electronic keyboard musical instrument
15. D411564 - Electronic keyboard musical instrument