Average Co-Inventor Count = 5.00
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. The University of Tokyo (1 from 1,290 patents)
2. Foster Electric Company, Limited (1 from 68 patents)
3. Kogakuin University (1 from 14 patents)
1 patent:
1. 11955938 - Acoustic output device and acoustic output method