Average Co-Inventor Count = 1.48
ph-index = 3
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 (4 from 5,450 patents)
4 patents:
1. 10334365 - Acoustic processing device
2. 7829780 - Hybrid wind musical instrument and electric system incorporated therein
3. 7741555 - Hybrid wind musical instrument and electric system for the same
4. 7049503 - Hybrid wind instrument selectively producing acoustic tones and electric tones and electronic system used therein