Average Co-Inventor Count = 1.12
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. Yamaha Corporation (16 from 5,451 patents)
16 patents:
1. 8461445 - Electronic percussion instrument having groupable playing pads
2. D607922 - Electronic drum
3. D598043 - Electronic piano
4. D579040 - Electronic piano
5. D577057 - Electronic piano
6. D571848 - Electronic piano
7. D566163 - Electronic piano
8. D566164 - Electronic piano
9. D555712 - Electronic keyboard instrument
10. D542777 - Combined speaker and amplifier
11. D481066 - Piano
12. D481065 - Piano
13. D415189 - Electronic keyboard musical instrument
14. D401611 - Electronic keyboard musical instrument
15. D328915 - Electronic drum