Average Co-Inventor Count = 1.50
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 (12 from 5,452 patents)
12 patents:
1. D614686 - Electronic percussion
2. D599841 - Electronic keyboard instrument
3. D569896 - Electronic percussion
4. D554178 - Electronic keyboard instrument
5. D552157 - Electronic keyboard instrument
6. 6140565 - Method of visualizing music system by combination of scenery picture and
7. D405790 - Disc player with radio tuner
8. D387374 - Electronic percussion instrument
9. D382005 - Electronic keyboard musical instrument
10. D376365 - Musical tone generator
11. D375115 - Musical tone control apparatus
12. D371365 - Combined speaker box and amplifier