Average Co-Inventor Count = 1.20
ph-index = 4
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. Pioneer Electronic Corporation (6 from 2,861 patents)
6 patents:
1. D291080 - Loudspeaker
2. D290697 - Speaker
3. 4582162 - Automobile speaker unit
4. D281067 - Loudspeaker
5. D281065 - Loudspeaker
6. D281068 - Loudspeaker