Average Co-Inventor Count = 1.50
ph-index = 4
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 (7 from 5,452 patents)
7 patents:
1. 7470854 - Electronic music apparatus
2. 6518491 - Apparatus and method for automatically generating musical composition data for use on portable terminal
3. 5895449 - Singing sound-synthesizing apparatus and method
4. 5744741 - Digital signal processing device for sound signal processing
5. 5646362 - Sound parameter editing device for an electronic musical instrument
6. 5391827 - Electronic musical instrument having a musical tone parameter display
7. 5361672 - Electronic musical instrument with help key for displaying the function