Average Co-Inventor Count = 2.00
ph-index = 3
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. Toa Corporation (3 from 57 patents)
3 patents:
1. D702212 - Speaker
2. D584721 - Microphone
3. D583806 - Microphone