Average Co-Inventor Count = 2.40
ph-index = 1
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. Rion Company Ltd. (2 from 85 patents)
2 patents:
1. 10888253 - Audiometer
2. 10390126 - Earphone for audiometer, and audiometer