Average Co-Inventor Count = 1.03
ph-index = 10
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 (29 from 5,451 patents)
2. Yamaha Corporatoin (1 from 1 patent)
30 patents:
1. D1041553 - Slider knob
2. D1010726 - Music stand
3. D963618 - Microphone
4. D930066 - Electronic keyboard
5. D879870 - Electronic piano
6. D879737 - Speakerphone
7. D865047 - Pickup for drum
8. D863247 - Speakerphone
9. D856961 - Speakerphone
10. D832335 - Pickup for drum
11. D832336 - Pickup for drum
12. D831003 - Connectable signal processing device
13. D816762 - Guitar
14. D810043 - Guitar amplifier
15. D778351 - Electric guitar