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. International Business Machines Corporation (3 from 164,135 patents)
3 patents:
1. 9349302 - Voice output device, information input device, file selection device, telephone set, and program and recording medium of the same
2. 8494860 - Voice output device, information input device, file selection device, telephone set, and program and recording medium of the same
3. 7403897 - Voice output device, information input device, file selection device, telephone set, and program and recording medium of the same