Average Co-Inventor Count = 2.57
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. Audio-technica Corporation (4 from 216 patents)
4 patents:
1. D1101817 - Audio mixer
2. D1042329 - Battery charger for earphones
3. D1030719 - Earphone
4. D1018496 - Headphone