Average Co-Inventor Count = 1.33
ph-index = 6
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. 7579543 - Electronic musical apparatus and lyrics displaying apparatus
2. 6417438 - Apparatus for and method of providing a performance guide display to assist in a manual performance of an electronic musical apparatus in a selected musical key
3. 6211452 - Electronic musical instrument having a function of dividing performance information into phrases and displaying keys to be operated for each phrase
4. 6118065 - Automatic performance device and method capable of a pretended manual
5. 6011210 - Musical performance guiding device and method for musical instruments
6. 5902948 - Performance instructing apparatus
7. 5886273 - Performance instructing apparatus