Average Co-Inventor Count = 1.81
ph-index = 2
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. 12183312 - Vibration plate and musical instrument
2. 11114071 - Percussion instrument
3. 11094302 - Effect imparter for musical instrument
4. 10984760 - Musical instrument and vibrator
5. 10891923 - Vibrator and musical instrument
6. 10692479 - Musical instrument pickup and musical instrument
7. 9959849 - Drum
8. 9570054 - Musical bar for musical instrument
9. 8426711 - Snare strainer
10. 8022281 - Shell for drum and drum using the same
11. 7884272 - Snare strainer having a magnetic holding member
12. 7692082 - Drum