Average Co-Inventor Count = 4.00
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 (4 from 5,450 patents)
4 patents:
1. 9832071 - Information processing system, setting alteration method and computer program
2. 9407983 - Microphone device
3. 7224811 - Audio system utilizing personal computer
4. 6118344 - Frequency control apparatus and method and storage medium storing a