Average Co-Inventor Count = 3.60
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. Rion Company Ltd. (2 from 85 patents)
2. King Jim Co., Ltd. (1 from 168 patents)
3 patents:
1. 11252493 - Hearing device and earphone
2. D720075 - Hearing aid
3. D526344 - Tape writing device