Average Co-Inventor Count = 2.18
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. Oki Electric Industry Co., Ltd. (4 from 4,979 patents)
4 patents:
1. 7285711 - Music player
2. 7205470 - Play data editing device and method of editing play data
3. 7060886 - Music playback unit and method for correcting musical score data
4. 7010291 - Mobile telephone unit using singing voice synthesis and mobile telephone system