Average Co-Inventor Count = 1.89
ph-index = 5
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. Sony Corporation (6 from 58,132 patents)
6 patents:
1. D792376 - Headphone
2. D705195 - Earphone
3. D653242 - Earphone
4. D648708 - Earphone
5. D648317 - Earphone
6. D647888 - Earphone